Sort the following events to reflect the normal order in which they occur in g-protein-coupled receptor signaling leading to transcription of genes with camp response elements. your answer would be a four-letter string composed of letters a to e only, e. g. acbd. a. binding of creb to pka b. binding of camp to pka c. dissociation of pka into catalytic and regulatory subunits d. activation of adenylyl cyclase