Write a program either in C or Java threads, which calculates the inverse of the totient-Function for the number 999. The totient-Function returns the number of elements that are co-prime to 999 . Co-prime to 999 means that the Greatest Common Divisor of 999 and number x, smaller than 999 , is equal to 1 . Hence, the inverse should return the number of elements that are not coprime to 999. Example: totient-Function (8)=4; inverse of totient-Function (8)=3. Because only four numbers smaller than 8 , have 1 as the Greatest Common Divisor with 8 , namely 1,3,5 and 7 . The other numbers smaller than 8 , namely 2,4,6, have 2 and 4 as the Greatest Common Divisor with 8. Pseudo Code for Greatest Common Divisor: GCD(a,b) if b==0 return a else return GCD(b,(a%b))