The demand function for coffee is given by De = 780 - 6Pc + 0.9P and that for tea is given by De = 550 - 2P+ + 0.6Pc where Pc is the price of coffee and Pr is the price of tea. The respective supply functions are Se = 5+3Pc + 6wc and St = 5 +8P+ + 5wt where we and we are the indexes of weather conditions affecting production of coffee and tea respectively. a) Write an expression for the equilibrium P: as a function only of w. and wt. Note: you have to round the constant and both coefficients correctly to 2 digits in order for Variate to mark parts a and b correct. b) Write an expression for the equilibrium P: as a function only of we and wt. Calculate the comparative-statics effects on: ap* c) Equilibrium P: of changes in weather conditions variable, and on awc d) Equilibrium P of changes in tea-growing weather conditions variable, owt