5. The marginal rate of substitution (MRS) at Point Z is -0.6 (that is, the slope of the tangent line at Point Z is -0.6). What is the utility value of two pounds of broccoli in terms of lettuce utility based on the utility exchange rate that is derived from the MRS? That is, how much utility is two pounds of broccoli worth when it is measured in units of UL? Show the appropriate utility exchange rate first and then calculate the utility value of two pounds of broccoli in terms of UL. W 6 4 (lbs) Broccoli S w Z Curve B T N 1 Y Curve A U Curve C 0 3 4 V 5 6 7 Lettuce (Ibs)