Given a solid R contained in a semi cylinder with the hight 1 which has a semicircle with radius 1 as the base. The cross section at the hight x (0≤x≤1) is the form combined with two right-angled triangles as attached figure as below. Answer the following questions.(1) Find the cross-sectional area S(x) at the hight x.(2) Find the volume of R. If necessary, when you integrate, set x=sint. calculusintegrationgeometrytrigonometrycalculus computations