Suppose the economy is producing $4.000 income (Real GDP}. What must be true? $1.05) -Y E .750 + 0.15? sum 5!.\" $2.\" \"all!\" 12.03} \"Jill! ii.\" 550) w I\" SI,\" 51 m H.\" 52,\" um: 5.! an: H,\" a\" \"HI-MD] 0 Firms unexpectedly add to their inventories 0 Firms must add to their inventories by increasing production 0 Firms unexpectedly reduce their inventories. 0 Firms reduce their inventories by decreasing production