a$.$ Calculate the accumulated value of his investment at the end of the first $5$ years.

$$52,419\mathrm{.}26$

$$53,258\mathrm{.}45$

$$18,277\mathrm{.}71$

$$18,570\mathrm{.}16$

b$.$ Calculate the accumulated value of her investment at the end of $11$ years.

$$52,419\mathrm{.}26$

$$53,258\mathrm{.}45$

$$44,091\mathrm{.}44$

$$1857016$

c$.$ Calculate the amount of interest earned from the investment.

$$15,858\mathrm{.}45$

$$15,019\mathrm{.}26$

$$10,737\mathrm{.}17$

$$5,121\mathrm{.}28$