Application 1 1- Calculate the value one year before the first payment current of a suite of 10 constant annuities of 17,500 each, rate = 9% per year. 2- Calculate the present value of this same suite 3 years before the first payment, rate = 9% per year. 3- A debt of 300,000 euros is repayable in 20 constant quarterly payments, the first payment in 3 month, rate = 9% per year. Calculate the amount of the quarterly (annuity) of refund