Suppose a call option sells for $$2\mathrm{.}50,$ a put option sells for $$2\mathrm{.}00,$ both options have a $$25\mathrm{.}00$ striking price, the current stock price is $$25\mathrm{.}50,$ and the options both expire in forty$-$six days. Using the put$-$call parity model, calculate the rate of interest implied in these numbers.