Write a code segment to determine the average temperature of a liquid during an experiment by evaluating the cooling curve below using the integral$$command$.$

A$)$ Encode the equation as an anonymous function$($not a symbolic function$).$ Call the variable that contains this function T$.$

B$)$ Use the integral$$function to find the integral with respect to t$,$ evaluated from $0$ to $15$ seconds. Name the variable that holds the result avgTemp.