Vertical launch from the Moon

A body is launched vertically from the surface of the Moon with speed $v_0=2.0km/s$. Compute the maximum altitude reached. Data: $M_L=7.35\cdot 10^{22}\mathrm{kg}$, $R_L=1.74\cdot 10^6\mathrm{m}$, $G=6.67\cdot 10^{-11}\mathrm{N}\cdot {\mathrm{m}}^2/k{\mathrm{g}}^2$; the Moon has no atmosphere.