4. Consider the following components and their properties: Part Name Availability 0.95 Part A Part B 0.85 Part C 0.75 Price 45 20 15 The system should include at least 1 and at most 2 of each component to work. a. Design and draw the system with highest availability. (4 points) b. Calculate the overall system availability of the system you have designed in a. (4 points) c. Design and draw the system with highest availability that costs at most 130 units of money. (4 points) d. Calculate the overall system availability of the system you have designed in c. (4 points)