Anika saved $$210$ at the end of every month for $7$ years in his bank account that earned $5\mathrm{.}50\%$ compounded monthly.

a$.$ What is the accumulated value of his savings at the end of the period?

$$21,150\mathrm{.}73$

$$21,457\mathrm{.}67$

$$112,787\mathrm{.}09$

$$3,817\mathrm{.}67$

b$.$ What is the interest earned over the period?

$$3,607\mathrm{.}67$

$$21,457\mathrm{.}67$

$$4,027\mathrm{.}67$

$$3,817\mathrm{.}67$