Current ChatGPT is a free service. Suppose ChatGPT starts to charge for their service. In order to access the service Jeremiah will have to pay $20 per semester. ChatGPT will also charge a fee of $0.25 per prompt. Jeremiah typically has to make 4 prompts for each paper he writes, meaning this will add an additional cost of $1 for each paper he writes. a. What will be Jeremiah's cost structure after ChatGPT's new cost structure