Please write a function called "op_bits" that receives 3 arguments:

• a byte value called "reg"
• an integer called "bit_pos"
• an integer called "op"

where the function will return the "reg" modified with the bit modified at the position "bit_pos" depending on the "op" string, where the following options for op are:

• "SET": set the bit "bit_pos" of "reg"
• "CLR": clear the bit "bit_pos" of "reg"
• "TOG": toggle the bit "bit_pos" of "reg"
• default: return 0

Write a program that calls this function 4 times (one per option) and prints the result in the screen