4. (20 points) Consider two decimal numbers: X = 0.3125 and Y = -15.96875. (a) (10 points) Write down X and Y in the IEEE 754 single-precision format. You must detail how you get the answers, or you will receive 0 points. (b) (5 points) Assuming X and Y are given in the IEEE 754 single precision format, show all the steps to perform X+Y and write the result in the IEEE 754 single precision format. (c) (5 points) Assuming X and Y are given in the IEEE 754 single precision format, show all the steps to perform X X Y and write the result in the IEEE 754 single precision format.