Can you please explain step by step how you solve this questions

your method clearly. 7. Use the moving and additivety principles about area to determine the area, in square inches, of the shaded flower design in Figure 12.18. In determin- ing the area of the shape, use no formulas other 2 in. in. than the one for areas of rectangles. Explain your method clearly. FIGURE 12.18 Flower designuse. 5. Figure 12.16 shows the floor plan for a modern, one-story house. Bob calculates the area of the floor of the house this way: 36 X 72 - 18 X 18 = 2268 ft2 What must Bob have in mind? Explain why Bob's method is a legitimate way to calculate the floor area of the house, and explain clearly how one or both of the moving and additivety principles on area apply in this case. 72 ft 36 ft 18 ft 18 ft 36 ft ing and 18 ft and 18 ft 36 ft ray ise FIGURE 12.16 Floor plan for a modern house3. An area problem: The Johnsons are planning to build a 5-foot-wide brick walkway around their rectangular garden, which is 20 feet wide and 30 feet long. What will the area of this walkway be? Before you solve the problem yourself, use Kaitlyn's idea: a. Kaitlyn's idea is to "take away the area of the gar- den." Explain how to solve the problem about the area of the walkway by using Kaitlyn's idea. Ex- plain clearly how to apply one or both of the mov- ing and additivety principles on area in this case. b. Now solve the problem about the area of the walkway in another way than you did in part (a). Explain your reasoning. 4. Figure 12.15 shows a design for a herb garden, with approximate measurements. Four identical plots of 20 feet 12 feet feet 8.5 feet 8.5 20 feet FIGURE 12.15 A herb garden