ADVANCED ANALYSIS Assume that demand for a commodity is represented by the equation P  10  .2Qd and supply by the equation P  2  .2Qs, where Qd and Qs are quantity demanded and quantity supplied, respectively, and P is price. Using the equilibrium condition Qs  Qd, solve the equations to determine equilibrium price. Now determine equilibrium quantity. Graph the two equations to substantiate your answers.