Please help solve the following problems:

For question 5, a more detailed explanation and reasoning is preferred

1. Compute dy/da, NO simplification is required. (Show all steps if the chain rule is used.) sin c (a) y = - 3 + x2+ 2' (b) y = (1 + cosx) (vr + -+ tanx). (c) y = V1 + 2tan(mr). (d) y = sec?(2x3 + 5r + 4). (e) y = (x2 + 1) sin r5. Determine whether the function T sin HI f(x) = if * * 0 if x = 0 continuous and/ or differentiable at = 0. Clearly explain your reasoning