What APR$($r$)$ is being earned on a deposit of $$5,280$ made $10$ years ago today if the deposit is

worth $$10,538\mathrm{.}21$ today? The deposit pays interest semiannually. and how do you input that in a financial calculator?

a$.3\mathrm{.}63\%$

b$.6\mathrm{.}89\%$

c$.7\mathrm{.}03\%$

d$.7\mathrm{.}26\%$