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Pb₁=4*2*2=16
Pb₂=3**4*2=24
Pb=16+24=40
Pc=2*6+40=52
Pc=2(ab+bc+ac)
Pc=2(3*2+2*4+3*4)
Pc=2(6+8+12)
pc=2*26
pc=52cm
:P:)