Pls help with 3 & 4

e supply side of the economy is defined by: Y = 6K25[.35 K = 200 L = 400 he demand side of the economy is defined by: C = 150 + 0.6(Y-T) I = 800 - 3000r G = 500 T = 400 1. Prove this production function has constant returns to scale. Start by letting z = a positive scalar. [4] 2. Using the production function, calculate the following variables. Be sure to show your work for cred No credit will be given if you do not show your work [4] The supply of output (Y). The real wage (W/P). . Total payments to labor (NOTE: This is not the share of income, it is the total payments) 3. Compute the equilibrium interest rate. [4] 4. Compute consumption, investment and national savings. [6]