Please solve this exercise step by step, so all the step should be appear

Exercise #1: (6 marks) Balance each of the following redox reactions in basic condition. Use the half reaction method to do so. (Show all the steps). a) Zn ) + CaCO3(s) + ZnO4) + CaO) + CO ) b) NH3(g) + O2(g) NO) + H2O)