Would you please complete this ASAP, please, I need the material for an upcoming test. !!!!!! Within 45 minutes of submission, please!!

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15. DETAILS A quadratic function f is given. f(x) = x2 - 16x + 48 (a) Express fin standard form. f(x ) = (b) Sketch a graph of f. 50 50 X X -50 50 #50 50k -50 O O, 50 50 X -50 X 50 -50 50 -50 -50 O O (c) Find the maximum or minimum value of f. f(x) = Is this a maximum or minimum value? O maximum value O minimum value