What Is the Probability That It Will Take Less Than $\mu$

What is the probability that it will take less than or equal to 0.25 hours to service any call based on the following exponential probability distribution with rate $\mu$ = 5?
$\begin{array}{llcc} \quad\quad\text { Average Service Rate } &\\\hline \text { \(\mu\) =5 } &\text { per hour} &\\\end{array}$

$\begin{array}{cc}\mathrm{T} & \mathrm{P}(\text { service time } \leq \mathrm{T}) \\\hline 0.00 & 0.00 \\0.05 & 0.22 \\0.10 & 0.39 \\0.15 & 0.53 \\0.20 & 0.63 \\0.25 & 0.71 \\0.30 & 0.78 \\0.35 & 0.83 \\0.40 & 0.86 \\0.45 & 0.89 \\0.50 & 0.92 \\0.55 & 0.94 \\0.60 & 0.95 \\0.65 & 0.96\end{array}$

A) 0.00
B) 0.71
C) 0.92
D) 1.00