please answer with full steps or explanation.

The following three questions refer to the decimal number 67.875 2. What is the fixed point representation of this number in the "hybrid binary system using the "binary point"? a. 1001101.111 c. 10000001.0101 e. 1000011.111 b. 1000111.111 d. 1000001.011 3. What is the normalized mantissa of this binary number that will be used to build the IEEE-754 floating point representation of the original number? a. 001101111 c. 0000001011 e. 000001011 b. 000011111 d. 00000010101 4. What is the biased exponent that will be used to build the IEEE-754 floating point representation of the original number (in decimal representation)? a. 6 c. 134 e. -120 b. 133 d. -121