Fill in the appropriate blanks for the derivatives of the given functions, then evaluate each derivative at x=1.    a) v(x)=(x^3+1)^4 (x−2)^5 v′(x)=AxB(x^3+1)3(x−2)5+C(x−2)D(x^3+1)E A= B= C= D= E= v′(1)=