2. Surface area = 6 * 4 2 = 6 *16 = 96cm2, volume = 4 3 = 4 *16 = 64cm3;
3. Surface area = 2 * (8 * 5+8 * 5+5 * 5)+2 * (5+5) * 5 = 310cm2, volume = 5 3+8 * 5 * 5 = 325cm3.