dw For the given functions, (a) express dt as a function of t, both by using the chain rule and by expressing w in terms of t and differentiating directly with respect to t. Then (b) evaluate dw it at the given value of t. w = gye - Inz, x = In (t- + 1), y=tan " 't. z= e5t. 1= 1 dw (a) dt dw (b) dt (Type an exact answer, using x as needed.)