Write a recursive function power$($base$,$ exponent$)$ that calculates and returns base$-$sponent. For example power$(3,4)=3*3*3*3.$ Assume that exponent is an integer greater than or equal to $1.$ Enter base : $3$ Enter exponent : The result of power$(3,$ QP$044)$ is $81$ Problem $2(50)2.$ Write a recursive function Sum$($base$,$ erponent$)$ that calculates and returns torent base". For example, Sum$(3,4)=31+32+33+34.$ Assume that exponent is an integer greater than or equal to $1.$ Enter the base: $18$ Enter the exponent : $5$ The result of sum$(10,5)$ is $111110$ Hint: You can use pow$()$ function in math.h library.