11. Write a program in C++ to perform the following using operator overloading: (i) Area of a circle (ii) Circumference of a circle (iii) Area of a rectangle (iv) Area of a triangle (v) Perimeter of a...

11. Write a program in C++ to perform the following using operator overloading:

(i) Area of a circle

(ii) Circumference of a circle

(iii) Area of a rectangle

(iv) Area of a triangle

(v) Perimeter of a square

12. Write a program in C++ to find the simple and compound interest (I) of a given principal (P), rate of interest (R) and number of years (N), using operator overloading.