a ) NWD (11,13) = 1
NWW (11, 13) = 143
b) NWD (11, 22) = 11
NWW (11, 22) = 22
c) NWD (22,26) = 2
NWW (22, 26) = 286
d) NWD (36, 54) = 18
NWW (36, 54) = 108
e) NWD (90, 135) = 45
NWW (90, 135) = 270
f) NWD (240, 600) = 120
NWW (240, 600) = 1200
