Van Dyke Corporation has a corporate tax rate equal to $25\%.$ The company recently purchased preferred stock in another company. The preferred stock has an $8\%$ before$-$tax yield. What is Van Dyke's after$-$tax yield on the preferred stock? Assume a $50\%$ dividend exclusion for taxes on dividends. $($Round your final answer to two decimal places.$)$

a$.7\mathrm{.}00\%$

b$.4\mathrm{.}00\%$

c$.5\mathrm{.}00\%$

d$.6\mathrm{.}00\%$

e$.2\mathrm{.}00\%$