7. Translate each of the following problems from decimal notation into two's complement notation using bit patterns of length four, then perform the addition and give the answer: a. 7 + (-2) b. 1 + 5 8. Convert each of the following decimal into excess eight form and excess eight into decimal form vice-versa (Provide detailed steps to explain your conversion, direct answer to this question will not be considered) a. 1100 b. 0011 C. -8 d. 3 9. Take an example 8 bit value and show the sign, exponent and mantissa bits in floating-point notation format. 10. Decode the following bit patterns using the floating-point format. a. 11011100 b. 01101101