Exercise. points) In this exercise, we will apply the various techniques that we saw in class to evaluate the following definite integral:2222(x2-4)32dx(4 points) Using the appropriate trigonometric substitution, show that the following identity holds:2222(x2-4)32dx=1604tan4secd(To get credit, you need to show your computations and explain your reasoning. Providing the final result is clearly not enough.)