Find the area of the shaded region in Fig. 11.10, where arcs drawn with centres A, B, C and D intersect in pa…

Find the area of the shaded region in Fig. 11.10, where arcs drawn with centres $A$, $B$, $C$ and $D$ intersect in pairs at mid-points $P$, $Q$, $R$ and $S$ of the sides $AB$, $BC$, $CD$ and $DA$, respectively of a square $ABCD$ (Use $\pi =3.14$).