I'm having trouble with the the price remaining constant and would appreciate if someone could answer these questions.

Use the information below for a four sector economy, answer the following questions: = 400 + 0.5 Yd where: Yd = disposable income = 60 Y = GDP = 150 C = consumption G = 350 T = taxes X = 550 I = investment M = 50 X = exports Yd = Y-T M = imports Yp = potential output = 3,140 Ye = real GDP (Assuming price remain constant) Part 1: What is the value of real GDP (Ye)? |Number Part 2: What is the value of the Spending Multiplier (k)? Number Part 3: What is the value of the Gov't Surplus (+)/Deficit (-) ? Number Part 4: What is the value of the Trade Surplus (+)/Deficit (-) ? Number Part 5: What is the size of the Expansionary (-)/Recessionary gap (+)? Number Assume spending increases by 100, given this change answer the following questions: Part 6: What is the value of the new Ye? Number Part 7: What is the value of the new Spending Multiplier (k)? Number Part 8: What is the size of the new Expansionary (-)/Recessionary gap (+)? Number