Semi-empirical mass formula: also known as bethe-weizsacker mass formula is given as m(z, a) = n mn + z mh - b(z, a) (a) using the semi-emperical mass formula obtain the separation energy for a neutron sn and seperation energy for a proton sp. you can assume that z and n are large. (b) using the expressions obtained above find the sp and sn for sn116.