Assuming that no energy is wasted, Use the equation Gpe=mgh Mass*gravity*height 1.2*7.2*9.8= 84.672 (The answer might be wrong I did it in my head)

[latex]E_k=mgh\\\\m=7.2\ kg\\\\g=9.8\ m/s^2\\\\h=1.2\ m\\\\E_k=7.2\cdot9.8\cdot1.2=84.672\ \left[\frac{kgm^2}{s^2}\right]=84.672\ [J][/latex]