$(1$ point$)$ In a certain city, the temperature $($in degrees Fahrenheit$)t$ hours after $9$ am was approximated by the function

$T(t)=80+6sin(\frac{t}{12})$

The function $T$ tells us that the temperature at $9$ am was $,$ and the temperature at $3$ pm was

$$

Let $T_{\text{a}\text{v}\text{g}}$ be the average temperature during the period from $9$ am to $9$ pm $.$ Compute $T_{\text{a}\text{v}\text{g}}.$

$T_{\text{a}\text{v}\text{g}}=$

$$