Please provide the right justifications for each step. Only showing the process does not really help me to sincerely learn math.

4. Complete the parts below to find / x* v1 - 4x2 dx. (a) [8 pts] Use an appropriate trigonometric substitution to show that: x3V1 - 4x2 dx = sin (@) cos?(@) de . To earn full credit, you must show all intermediate steps.Problem 4 continued... (b) [6 pts] Determine the indefinite integral 16 sin (0) cos?(#) de. Your answer should be a function of e. Show your work.(c) [6 pts] Use parts (a) and (b) and a right triangle construction to determine x3v1 - 4x2 dx . Your answer must be a function of x. Show your work