Solve the Problem $f(x)= \begin{cases}56+3.6 t & \text { if } 0 \leq t \leq 7 \\ 81.2 & \text { if } 7<t \leq 10 \\ -5.4 t+135.2 & \text { if } 10<t \leq 16\end{cases}$

Solve the problem.
-In one city, the temperature in Fahrenheit on a typical summer day can be approximated by the following function:
$f(x) = \begin{cases}56+3.6 t & \text { if } 0 \leq t \leq 7 \\ 81.2 & \text { if } 7<t \leq 10 \\ -5.4 t+135.2 & \text { if } 10<t \leq 16\end{cases}$
Here, $t$ represents the number of hours since 6 a.m. Find the temperature at 5 p.m.

A) $75.8^{\circ}$ Fahrenheit
B) $108.2^{\circ}$ Fahrenheit
C) $73.8^{\circ}$ Fahrenheit
D) $77.0^{\circ}$ Fahrenheit