$9.$ Suppose the Williams Health Clinic receives a multiyear pledge from a donor. The donor stipulates that she will donate $$50,000$ at the beginning of each year for five years. WHC expects that it can invest the donation at a rate of return of $6\%$ annually. How much will WHC expect to have at the end of $5$ years? $$281,854\mathrm{.}65$

$10.$ Return to question $9.$ Suppose at the end of year $5,$ WHC decides it would like to use the accumulated money from the multiyear donation for various capital projects that the organization has. Assuming WHC can earn $6\%$ annually on investments, how much per year can it withdraw at the end of each year for $7$ years before the account has been exhausted? $($I need help with question $10)$