please I need the answer

Write a program to enter a number from the keyboard, and If the entered number is positive, calculate the perimeter of a cuboid. else, calculate the total surface area of a cuboid. Note-Perimeter=4(1 + b +h), Total surface area=2(lb+bh+hl). (All the inputs should be entered from keyboard). (4 Marks) ii) Draw the flowchart for the whole program. (2 Marks)