*4.7 If the marginal product of labor is 5 and the marginal product of capital is 2.5 when 6 units of labor is combined with 3 units of capital, what is the marginal rate of technical substitution? M

*4.8 Alia considers stevia to be a perfect substitute for sugar when she bakes. However, since it is much sweeter than sugar, she uses much less stevia—one teaspoon of stevia when a recipe calls for one cup

(about 50 teaspoons) of sugar. She obtains the desired sweetness for a batch of cookies, for example, using the production function, q = V + 0.02S, where V is the number of teaspoons of stevia and S is the number of teaspoons of sugar. Draw an isoquant for q = 2 (sweetness for a double batch of cookies).

What are the marginal products of V and S? What is the marginal rate of technical substitution at each point along an isoquant?