When the hourly wage rate (w) of $15 and the hourly price of capital (r) of $75, the average cost of producing any specified level of output into the long run will be minimized where: (1) MPPL = MPPK. (2) MPPL/MPPK = r/w = 5. (3) MPPL/MPPK = w/r = 1/5. (4) MPPL/r = MPPK/w.
Can anybody suggest me the proper explanation for given problem regarding Economics generally?