Description: We are seeking an experienced React developer to build a two-page web application. The application will simulate API requests using mock data, support concurrent API calls for multiple URLs, and provide real-time metrics. Each component instance must independently handle requests and update results dynamically. Page 1: API Key Input 1. Purpose: o A page for users to input an API key. o On successful validation (via a mock API call), redirect the user to Page 2. 2. Functionality: o Input field for API key. o Button to validate the API key. o Display error message for invalid API key (mock validation). Page 2: API Request Component 1. Inputs: o Default Country: Editable field to set a default country for all URLs unless overridden. o Default Number: Editable field to set a default number of requests for all URLs unless overridden. o URL List: A dynamic list where users can: Add multiple URLs. Specify a country for each URL (overrides the default). Specify the number of requests for each URL (overrides the default). o Buttons to add or remove rows dynamically. Functionality: 1. Concurrent API Calls: o The application must allow API calls for multiple URLs to run concurrently. o Each request will send the following payload: API Key: Entered on Page 1. URL: The specific URL for the request. Country: Either default or specified for the individual URL. o The number of requests determines how many individual calls are made for each URL, but this is not included in the payload. 2. Dynamic Features: o Users can dynamically add or remove rows for multiple URLs. o Changing the default country or default number should instantly update all rows unless overridden for specific entries. 3. Results Display: o Summary Table: Metrics for each URL: URL Number of Successful Requests Success Rate (%) Number of Failed Requests Failure Rate (%) Metrics must update dynamically on the front end as responses are received. o Detailed Results Table: Each instance of the component will have its own Detailed Results Table. For every individual response received, the following details must be displayed in the table of the correct instance: URL ISP IP Address Proxy Status (Green for success, Red for failure). Responses must be matched to the correct instance based on where the request originated, ensuring real-time updates. 4. Multiple Component Instances: o Allow multiple instances of the component on the same page. o Each instance must work independently to handle separate API calls and update its own results. Technical Requirements: 1. Framework: The application must be built in React. 2. Concurrency: o Support concurrent API calls for multiple URLs. o Ensure responses are mapped to their originating instance. 3. Mock Data: o Use a static JSON or JavaScript file to simulate API responses. o Example response for each request: URL: The requested URL. ISP: Mock ISP name. IP Address: Mock IP. Proxy: Mock proxy name. Status: Mock status (success or failure). 4. Error Handling: o Handle errors gracefully with appropriate user feedback. 5. Responsive Design: o Ensure the application works seamlessly on desktop and mobile devices. Deliverables: 1. Fully functional two-page React application with the described functionality. 2. Clean, modular, and well-documented code. 3. A short README file explaining the setup, functionality, and mock data usage. Budget and Timeline: • Please specify your estimated cost and timeline in your proposal.