Find the area of the unshaded region in the figure if $ABCD$ is a square of side 14 cm and $APD$ and $BPC$ are semi circle <br>

Question

$\begin{array}{1 1} (a)\; 21 \;cm^2 \\ (b)\; 196 \; cm^2 \\ (c)\; 42 \;cm^2 \\ (d)\; 154 \; cm^2 \end{array}$