In C language please!

13.21 Functions - Ex1 The harmonic mean of two numbers is obtained by taking the inverses of the two numbers, averaging them, and taking the inverse of the result. Write a function called harmonic that takes two double arguments and returns the harmonic mean of the two numbers.The function must receive the two values as arguments. Read the two values from the user in the main function. When the input is 9.842 The output is 2.1392 Requirements . Read the inputs from the user . Declare the prototype of your function before the main function . Call your function to compute the result . Print out the result using the "9.41f" format . If any of the inputs is zero consider the inverse of that input to be 0 as well. . If both inputs are zero return 0. LAD ACTIVITY 13.21.1: Functions - Ex1 0/10 main.c Load default template... 1 #include 3/ Here goes the prototype of your function 5 int rainO [