How much would the price of a $6-$year bond with of return $(Rd)$ on the bond decrease from $10\%$ to $5\%?$

a$.$ Increase $50\mathrm{.}00\%$

b$.$ Decrease $20\mathrm{.}24\%$

c$.$ Decrease $25\mathrm{.}38\%$

d$.$ Increase $20\mathrm{.}24\%$

e$.$ Increase $25\mathrm{.}38\%$