4. Refer to the lecture \"Spatial Equilibrium in a Polycentric City\". Suppose worker density for oice fu'ms is equal to 320,.DCIU workers per unit area and density for household is 256'?! workers per unit area. Unit agricultural rent is equal to $4,. Unit commuting cost for each household is $2013 annually. Say there are two even-sized employment centers N1 = N2 = l workers each. land rent (a) What is the value for d1 d5? (b) What is the value for (it d}? (c) What is the land rent at the two employment centers?r