1.The function unsigned int create_key() is an x86-64 function that must prompt for using the printf) function) and read in each of the 4 digits of the key (using the getchar() function) and return the 8-bit key to the calling function. You must create an 8-bit key from those 4 digits using ONLY the bitwise OR instruction or ONLY the bitwise OR instruction and a shift instruction. For example, if the user specifies 0110, then your internal key must be 0110 0110.

2. The function unsigned_char rotate_right(unsigned char x) and the function unsigned char rotate_left(unsigned char x) are also x86-64 functions that must be passed a single hexadecimal value and return to the calling function that value rotated 1 position right or left, respectively.