Which produces more energy: nuclear fusion or nuclear fission?

Differentiate between nuclear fission and nuclear fusion.

Which of the two, nuclear fission and nuclear fusion, is made use of:

(i) for the production of electricity?

(ii) for making a hydrogen bomb?

Calculate the energy released in joules when 5 g of a material is completely converted into energy during a nuclear reaction.

How much is this energy in Me V? (Speed of light= 3 x 10⁸ m/s)