4) Write a C\# program in Windows Form to calculate Zakat amount for the given amount. [Hint: Enter the amount in textbox, then it should give zakat amount by calculating "Enter amount value x.25 " in message box] [2.5 Marks ] 5) Write an C\# program that inputs from the user the radius of a circle as an integer and displays the circle's diameter, circumference and area using the floating-point value 3.14159 for diameter =2r circumference =2r area =r2 [1 Mark]