Hi, I have a problem that trying to solve all evning and it is in two parts (a) If is a positive constant, find the set of valus of for which is negative. Find the value of a if this function has a minimum value of -27.

(b) Find two quadratic funcions of which are zero at , which take the value of 10 when and which have a maximum value of 18. Sketch the graps of these two functions. Can ou help me with this problem?