Consider the function f : R A R defined by r (m)=a=4 (1207. (a) Provide a list of all the critical numbers of f . Separate the values by a semi-colon should there be more than one. Input the word \"none\" (without quotes or capitals) should there be none. 2:: E] (b) Provide a list of all the local minima of f (following the same instruction). 3: E] (c) Provide a list of all the local maxima of 3' (following the same instruction). :1}: E]