B. Analyze the problems below and answer the following questions.: Show your solution. 16 - 17. What is the area of a garden with (x + 3y + z) meters long and (x + 3y + z) meters wide? For items 18 - 20. Refer to the figure below and answer the following questions. x + 4 units 18-19. What is the volume of a cube? Show your solution 20. What special product is applied in solving the problem?​