3. Clearing a bit Write a function that accepts as input an unsigned char, and an integer bitNum (range 0-7) and using the "shift and' and "not" operators clears the bit at position bitNum (namely, sets the bit at position bitNum to 0). The function returns modified character. Note,that no assumption is made For example, if the bit sequence of a char is 00010100 and bitNum4 then the answer should return 00000100. unsigned char clearBit(unsigned char c, int bitNum)