The height of the ball when lifted is given by 7sin(25)=2.96 the gravitational energy is mgh, the kinetic is (1/2)mv². We can set these equal since the pendulum doesn't lose much energy mgh = (1/2)mv² we can divide by m (since we don't have it anyways) gh = v²/2 v=√(gh/2) = √(9.81*2.96/2)=3.8m/s. Not exactly one of your choices, but the right one none the less