Re problem 28 (i.e. the ¡­

Re problem 28 (i.e. the 'fairly large' one): I realize I have not yet covered the implicit derivative formula ¨C it should be well known from ECON2200 though. You will need this for 28 part (e); there, you define G(x,a) = [the same formula as for g(x)], and use the implicit derivative formula to find the derivative.