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List out the question. Not everyone that might answer it knows them by heart.
What are you having trouble with, specifically? I just did this one and spent quite a while on it. After assigning variables to the input and making them floats, you're basically going to have to do two things. You'll create a "for" or a "while" loop which simulates the passage of 12 months of interest accrual and payments with a given payment. Then you'll need to nest that within another loop which incrementally increases the monthly payment amount. This way, you can quickly simulate a year with many possible monthly payments.
If you post the question and the code you're working with we can offer more help.