Express the negative value -27 as a 2s complement integer using eight bits. Repeat, using 16 bits. Repeat, using 32 bits. What does this illustrate with respect to the properties of sign extension as they pertain to 2s complement representation.

Write the results of the following additions as both 8-bit binary and decimal numbers. For each part, use standard binary addition.

A) Add the signed magnitude representation of 7 to the signed magnitude representation of -7.

B) Add the 2s complement representation of 7 to the 2s complement representation of 7.