Please answer all questions. Neatly please

R.K. Sahi (10 points) Fill in the blanks. (a) The first rule that we would use to find the derivative of f(x) = xIn(Vx + 1) is Hint: Chain Rule, Product Rule, Quotient Rule (b) For the integral given below, find the u-substitution and the change of variables. sec x d.x Vtan x u = for x = 0, u = du = for = u = (c) The sigma notation for the sum given below is 6 14 2 + 1 + 2+2 + 2+3 + ..... + 2+ 11