Use a graphical procedure and manual calculation to determine the optimal solution to the following linear program for decision-making purposes. Excel Linear Programing has been used to generate the following graph on the objective and constraints (please notice that you do not need to create this program in Excel, just use the outcomes given here to answer the questions):

Objective: Minimize cost C C= 0.5 Xa + 0.4 Xb

10 Xb 9 A 7 +>=10 >= 9. -#>=9 C-0.5 5 -C-1 -# >=2 C-1 D E2 B C >= 10 >= 2 0 K Xa O. C-0.5 1G 2H 3J 6 7