b) From the following assumptions, derive a model for development- a a (i) There is a dual economy i.e., the economy is characterized by a traditional, over-populated rural subsistence sector furnished with zero MPL, and the high productivity modern urban industrial sector. (ii) The production in the advanced sector is higher than the production in traditional and backward sector. (iv) The supply of labor is perfectly elastic. In other words, the supply of labor is greater than demand for labor. c) Show the cases where Normal profits occur. Illustrate the type of product the producers deal in to earn normal profits in long run and short run. Interpret short run anyway