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[tex]a) \ L = 4 cm + 1 cm + 1 cm + 3 cm + 1 cm + 3 cm + 2 cm + 1 cm =\boxed {16 cm}\\\\P = 1 cm \cdot 4 cm + 1 cm \cdot 3 cm=4 cm^{2}+3cm^{2}=\boxed {7cm^{2}}\\\\\\b) \ L = 9 cm + 2 cm + 7 cm + 6 cm + 2 cm + 8 cm = \boxed {34cm}\\\\P = 9 cm \cdot 2 cm + 6 cm \cdot 2 cm = 18 cm^{2}+12 cm^{2} = \boxed{30 cm^{2}}[/tex]
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