$--$How do I solve Part A$,$ B$,$ and C$?--$

PART $1)$ CALCULATE HOW MUCH COULD BE SPENT ON THIS PROJECT USING:

PART A$)$ A LOAN REPAYMENT TABLE USING SOLVER TO FIND THE FIRST COST.

INTEREST IS $20\%$ OF BEGINNING BALANCE

PAYMENT IS FIXED

PART B$)$ USING THE $($A$/$P$,$ I, n$)$ EQUATION GIVEN IN CLASS

PART C$)$ USING THE PV FUNCTION IN EXCEL