In Problems 7 and 8 , find the growth factor G(s,t) for the differential equation, and then find the general solution, using the formula y(t)=y(0)G(0,t)+∫ 0 t G(s,t)q(s)ds. 7. dy/dt=−2ty+2te−t². 8. dy/dt=(sint)y+2sint.