In the below figure, ST is parallel to QR. If ∠a is 113° and ∠b is 122° then find the interior angles of the triangle PST. Experts pls answer fast.

a)-2(x+3)=8

In the below figure, ST is parallel to QR. If ∠a is 113° and ∠b is 122° then find the interior angles of the triangle PST. Experts pls answer fast.