Suppose the following equations characterize sup$-$ply and demand in the labor market model:Labor Supply: Ls $=2$w $+30$Labor Demand: Ld $=60$ wEquilibrium occurs at an employment level L and a wage w$,$ so that the labormarket clears. That is$,$ labor supply is equal to labor demand: Ls $=$ Ld$.$a$.$ What are the endogenous variables in the labor market model?b$.$ Solve for the equilibrum values of the endogenous variables