Company A has a beta of $0\mathrm{.}70,$ while Company B$\text{'}$s beta is $1\mathrm{.}40.$ The required return on the stock market is $9\mathrm{.}00\%,$ and the risk$-$free rate is $2\mathrm{.}25\%.$ What is the difference between A$\text{'}$s and B$\text{'}$s required rates of return? $($Hint: First find the market risk premium, then find the required returns on the stocks.$)$ Do not round your intermediate calculations.

a$.6\mathrm{.}975\%$

b$.9\mathrm{.}338\%$

c$.6\mathrm{.}300\%$

d$.3\mathrm{.}150\%$

e$.4\mathrm{.}725\%$