Sharon has worked for a company with a retirement program, and today is retiring from her job with the amount of $$143000$ in her retirement account. She decides to withdrawal an equal amount from this account, once a year, beginning immediately, and ending $21$ years from today $($for a total of $22$ payments$).$ If the interest rate is $4\mathrm{.}75\%,$ solve for the annuity amount such that she uses up her full accumulation.