Hazel has a contract with a bank

she pays back her loan in 3 payments

-the first one is $5000 (made after a year)

-the second one is $4000(this is made 2 years and a half after the loan was contracted)

-the third one is 3000$, 5 years after the loan was contracted.

- we know that the NOMINAL DISCOUNT RATE is d^(2)=10%

a) find the loan amount

b) after the first payment, Hazel renegotiates her loan so that the nominal discount rate is now d^(4)=8% and her last payement is set to Y, Find Y

thank you so much its been two hours and i dont understand this question