(b) Consider the following demand and supply relationship in the market of golf balls: QD-90-2P -2T Qs = -9 + 5P - 2.5R Where On and Qs represent the quantities demanded and supplied respectively and P is the price. T is the price of the titanium, a metal used to make a golf clubs, and R is the price of rubber. i) If R = 2 and T= 10, calculate the equilibrium price and quantity of golf balls. (3marks) if) At the equilibrium values, calculate the price elasticity of demand and the price elasticity of supply. (3marks) ili) At the equilibrium values, calculate the cross-price elasticity of demand for golf balls with respect to the price of titanium. (2marks) iv) Explain the sign of this elasticity whether golf balls and titanium are substitutes or compliments. (2marks)