How high off the ground could a 75 kg person be raised using the energy from this battery?

When running on its 11.4 V battery, a laptop computer uses 8.3
W. The computer can run on battery power for 8.0 h before the
battery is depleted.

a)What is the current delivered by the battery to the
computer?

b)How much energy, in joules, is this battery capable of
supplying?

c)How high off the ground could a 75 kg person be raised using
the energy from this battery?