chris witherspoon a super salesman contemplating retirement on his $55$th birthday decides to create a fund on a $10\%$ basis that will enable him to withdraw $25,200$ per year on June $30,2029$ and continuing through $2032,$ to devolp this fund Chris intends to make equal contributions on June $30$ of each of the ears $2025-2028$ What are each of Chris's contributions to the fund