#65!!! For each function f and interval a,b in Exercises 56.67 definite integrals and the Fundamental Theorem of Calo to find the exact average value of f from x=a to x=b.7t use a graph of f to verify that your answer is reasonable,56.f(x)=x-1,[-1,3]57.f(x)=3x1,[0,4]58.f(x)=4-x2,[-2,2]59.f(x)=4,[-37.2,103.75]60.f(x)=(x2)2-5,[-5,0]61.f(x)=x2-2x-1,[0,3]62.f(x)=4x32,[a,b]=[0,2]63.f(x)=(ex)2,[a,b]=[-1,1]64.f(x)=13x1,[a,b]=[2,5]65.f(x)=2-x3,[a,b]=[1,8]