$(a)\;\large\frac{K_{1}+K_{2}}{mw^2}\qquad(b)\;\large\frac{K_{1}K_{2}}{(K_{1}+K_{2})w^2m}\qquad(c)\;\large\frac{(K_{1}+K_{2})}{w^2}\qquad(d)\;None\;of\;these$