for surface area, you will be doing l(ength) x w(idth) x h(eight) or l x w x h = sa
for #1: l x w x a = 4 x 9 x 11 = 396 (whatever the measurement is squared)
for #2: base x height 4 x 4 x 8 = 128 (whatever the measurement is squared)
hope this helps :D
