in program c

please be clear

-please add function declaration und defintion

avoid implicit data type conversions in your function calculation by using double constants (like 3.0f*x)

Write a program with a function that calculates the value of the polynomial. In the main program, the user should enter the value of the variable x. Then the value of the polynomial should be calculated by the function and then output. 3x5+2x45x3+x2+7x6 Test your code with many different user inputs like: Enter x:3.35 Value: 1358.32692531 Please dont forget the function header with description etc. Hint: Optimize your code use this version of the polynomial: ((((3x+2)x5)x+1)x+7)x6