d$.$ Invest $$32,784\mathrm{.}35$ and receive $$1,400,000\mathrm{.}00$ in $40$ years.

a$.$ What annual rate of return will Keiko earn if she invests $$350\mathrm{.}00$ today and receives $$760\mathrm{.}88$ in $11$ years?

$7\mathrm{.}30\%($Round to two decimal places.$)$

b$.$ What annual rate of return will Keiko earn if she invests $$3,800\mathrm{.}00$ today and receives $$12,641\mathrm{.}26$ in $16$ years?

$7\mathrm{.}80\%($Round to two decimal places.$)$

c$.$ What annual rate of return will Keiko earn if she invests $$32,304\mathrm{.}53$ today and receives $$150,000\mathrm{.}00$ in $20$ years?

$7\mathrm{.}98\%($Round to two decimal places.$)$

d$.$ What annual rate of return will Keiko earn if she invests $$32,784\mathrm{.}35$ today and receives $$1,400,000\mathrm{.}00$ in $40$ years?

$\%($Round to two decimal places.$)$