code in C !!

2. Write a program to calculate the arithmetic mean, the geometric mean, and the harmonic mean for a set of non-zero numbers. Ask the user to enter values for the numbers between 0 and 10 and enter -99 when they are done. Within the sentinel loop, calculate the required sums and product. Use doubles for the variables. Implement this loop as a do-while loop. arithmetic mean- .t /t geometric-means-1X1 * X2 . .. . X. 1 harmonic-mean- - Calculate the means after exiting from the loop and print using 3 decimal digits. Test with 8.2, 6.3, 5.2, 4.5, 7.8 3. Write a program that uses a for loop to prompt a user to enter a series of 5 ints reads in the five ints, and determines which of the five numbers was the largest and which of the five numbers was the smallest. Once the for loop is over, the program should output the largest number and the smallest number to the screen. Test your program with the following numbers: 12 42 96 8 24