Application of integrals 8.2

Let $I$‍ be the blue shaded region between the graphs of

$f(x)=\sin {\displaystyle \frac{\pi x}{2}}$‍and$g(x)=x^2$‍

and let $II$‍ be the red shaded region between the graph of

$g(x)=x^2$‍and the $x$‍-axis for $x\in [0,1]$‍

as shown in the figure.