Identify the true statements regarding liver glycogen phosphorylase a. (protein phosphatase 1 is abbreviated pp1)(a) phosphorylase a prevents early glycogen synthase activation.(b) when pp1 is bound to phosphorylase a, both pp1 and phosphorylase a are active.(c) liver phosphorylase a concentration decreases when glucose enters the blood.(d) liver phosphorylase a is regulated by amp, adenosine monophosphate.(e) the binding of glucose to liver phosphorylase a shifts the equilibrium from the active form to the inactive form.