3.72 A. $s_2 = s_1 - ((30 + 8n) & (-16))$ equals $s_2 = s_1 - (30 + 8n)>>4<<4$ b. $p = s_1 - (s_2 + 15)>>4<<4$ C. $e_1$, max is $24$. min is $1$. D. 16