ONLY ANSWER IN EXCEL FORMAT, FORMULA Exercise $5\mathrm{.}13$: Max begins planning for retirement on his twentieth birthday. He believes a good planning horizon is his eightieth birthday. He would like to deposit a certain amount, A$,$ in a moneymarket account earning $6\mathrm{.}5\%$ APR compounded weekly every year on his birthday from the time he turns $21$ until he is $64.$ He would like to increase the amount A by $4\%$ every year until the last payment. He believes he will need $$50,000$ to live on during his first year of retirement. He would like to increase the amount that he gets to spend by $6\%$ each year. What is the value of A that will allow him to achieve his goal?