PART B: Short Questions ii In your own words, provide an economic explanation of each of the 4 equations. What Short Question 1; (22 points) is the driver of longerun growth in this model? (6 points) The Rainer model can be described by 4 equations: Y. A.L ,. (1 AA,\" = 2M.\" (2 L\" + L\" = i (3 La; = ii (4 ) ) ) ) where Y is nal output, A is ideas/knowledge, L1, is employment in production of nal out put, Ln is the number of researchers, and L is the population i What are the endogenous variables? What are the exogenous variables and the pa- rameters? ( 5 points) iii Show: that the growth rate of output per person is equal to iii. If f = 0.04, 2 = 1/2000 and L = 1000, what is the growth rate of output per person? (5 points]