Find the Shaded Area $135 \mathrm{ft}^{2}$ B) $63 \mathrm{ft}^{2}$ C) $13.5 \mathrm{ft}^{2}$ D) $121.5 \mathrm{ft}^{2}$

Find the shaded area.
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A) $135 \mathrm{ft}^{2}$
B) $63 \mathrm{ft}^{2}$
C) $13.5 \mathrm{ft}^{2}$
D) $121.5 \mathrm{ft}^{2}$