How to solve the question?

(a) Find ~3- for each of the following. (i) y = sirs'l (tan(x2)) (3 marks) (ii) slew\" + y; = e (3 marks) (iii) y = (2 )6); (Note: You are required to express the answer in terms of x Mi (3 marks) (iv) y = {flew + l)dt (3 marks) (b) Let f(x) = see. (i) Find the relative extreme point of f on R. (4 marks) (ii) Use the result of (b)(i) to nd the number of real roots, if any, of the equation f [x)=c, where c is a positive constant. (4 marks)