need help with macroecon theory thank you!

1. Medieval Economy Money Model My = P,Y, Yt = 314 3+1 : (EY P, L Prices are sticky. P, is set at the night of t 1. (a) Suppose Z = 5, V = 1, fl = 1, Mt = M = 20, g = 0.1 solve for steady state P,L and Y. (b) Suppose money supply decreases at t = 0, M, = M = 10, and 9 increases to 0.2, what are the new steady state values of P, L and Y. (0) Following question (b). Before it = 0, the economy is at the old steady state. What is the level of P and Y at t = 1, one day after the money supply change? ((1) Discuss briey about \"longrun money neutrality\