An account is funded with $20$ annual payments. The first $10$ payments are $$200$

each and the next $10$ payments are $$100$ each. Given annual effective interest

of $3\%$ find the value of the account immediately after the final payment.

if done correctly you should find an answer of $$4227\mathrm{.}69.$ please explain how to get this answer, explaining all steps. Formulas:

$a_n=\frac{1-}{i}$

$u{?}^{(}()n)$

$s_n=\frac{(1+i{)}^n-1}{i}$

$a_n^{}=\frac{1-}{d}$

$u{?}^{(}()n)$

$s_n^{}=\frac{(1+i{)}^n-1}{d}$

$a_{}=\frac{1}{i}$

$a_{}^{}=\frac{1}{d}$

$d=\frac{i}{1+i}$

$i=\frac{d}{1-d}$