c code

write a program in C to find out the area and circumference of a circle where the diameter is given.(1.5)

write a program in C to find minimum of three numbers.(1.4)

write a program in C to calculate the roots of a quadratic equation ax^2 + bx + c = 0.(1.3)

write a program to check whether a given year is leap year or not.(1.2)

write a C program to convert temperature from degree fahrenhite to degree celcius.(1.1)