4. Maximize
The maximum is:
Step 1 :Find the intersection points of the given constraints:
Step 2 :
Step 3 :Intersection points:
Step 4 :Evaluate the function K at each intersection point:
Step 5 :
Step 6 :
Step 7 :
Step 8 :
Step 9 :
Step 10 :
Step 11 :Find the maximum value of K:
Step 12 :