Answer all 3 parts please

The total energy or potential energy expression for molecular mechanic (force field) is: Epot Estretch + Ebend + Etorsion + Eelectostatic + Edispersion Consider one molecule of methane: (i) How many terms would be present in the total energy equation for one molecule of methane? (ii) Write down the bending energy expression (including all the individual terms that contribute to the bending energy for one molecule of methane). (iii) How many parameters are in the total energy expression in this case? Explain the meaning of the different parameters