I don't understand this. Please thoroughly explain. Carry all calculations to two decimal places to reduce rounding error, especially in multisSunrise Industries wishes to accumulate funds to provide a retirement annuity for its vice president of research, Jill

Moran. Ms$.$ Moran, by contract, will retire at the end of exactly $12$ years. Upon retirement, she is entitled to receive

an annual end$-$of$-$year payment of $$42,000$ for exactly $20$ years. If she dies prior to the end of the $20-$year period,

the annual payments will pass to her heirs. During the $12-$year "accumulation period," Sunrise wishes to fund the

annuity by making equal, annual, end$-$of$-$year deposits into an account earning $9\%$ interest. Once the $20-$year

"distribution period" begins, Sunrise plans to move the accumulated monies to an account earning a guaranteed

$12\%$ per year. At the end of the distribution period, the account balance will equal zero. Note that the first deposit

will be made at the end of year $1$ and that first distribution payment will be received at the end of year $13.$

Case Study Questions:

How large a sum must Sunrise accumulate by the end of year $12$ to provide the $20-$year, $$42,000$ annuity?

How large must Sunrise's equal, annual, end$-$of$-$year deposits into the account be over the $12-$year

accumulation period to fund fully Ms$.$ Moran's retirement annuity?

How much would Sunrise have to deposit annually during the accumulation period if it could earn $10\%$ rather

than $9\%$ during the accumulation period?

How much would Sunrise have to deposit annually during the accumulation period if Ms$.$ Moran's retirement

annuity were a perpetuity and all other terms were the same as initially described?tep problems.