4. Use the graph to answer the following questions. a. Identify the regions of increasing, decreasing, and constant returns to scale on the following isoquants: b. Suppose r=$1 and w=$2. i. If the firm's goal is to minimize costs at an output of 300(Q=300) what combination of K and L should it use? ii. Write an equation for the firm's cost minimizing isocost. iii. What is the MRTS at that point? Explain. 4. Use the graph to answer the following questions. a. Identify the regions of increasing, decreasing, and constant returns to scale on the following isoquants: b. Suppose r=$1 and w=$2. i. If the firm's goal is to minimize costs at an output of 300(Q=300) what combination of K and L should it use? ii. Write an equation for the firm's cost minimizing isocost. iii. What is the MRTS at that point? Explain