Two blocks are connected by a massless string that passes over a massless, frictionless pulley. Block A is on a frictionless horizontal surface, and block B is on a frictionless ramp that makes an angle theta with the horizontal. The mass of Block A is twice the mass of Block B. Block A has an acceleration of 1.5 m/s^2 to the right. i. Find the angle theta that the ramp makes with the horizontal.