Engineering Economics homework problems

Earl wants to obtain a loan with interest rate of 10% per year. He would pay yearly payments for

6 years. The maximum amount he is able to pay is $5,000 in his last payment if he pays $200

more each time with respect to the previous payment. Considering the maximum loan he could

get under these circumstances, how would he have to pay such a loan if instead of fixed amount

incremental payments, he would have to pay incremental payments of 20% with respect to the

previous year?

I am not sure where to begin on this particular problem, can you please help me?