4 Consider the definite integral f 51(16 * m2)1/4 d1. 0 What is the substitution to use? 11. : .a (There can be more than one valid substitution; give the one that is the most efficient.) For this correct choice du = a ' (im- b If we make this substitution, then the integral becomes of the form f u) (in. What are a, b and u)? a. a, = Number I; = Number flu) : E! a Finally, use this work to compute 4 [0 500 (167332)\"4 aim 2 Give the exact value. B L.\