please help with any u can! thanks
questions:
1.[14] a) Find the 16-bit 2?s complement binary representation of the decimal number 1243.
b) Find the sign-and-magnitude binary representation of the decimal number -1243.
c) Find the 16-bit 2?s complement binary representation of the decimal number -1243.
2.[12] 100111100011001 represents a 16-bit 2?s complement binary number. What decimal number does it represent? (careful: count bits first)
3. [12]10011101 represents a 8-bit 2?s complement binary number. What decimal number does it represent?
4.[12] Add the following two 12-bit 2?s complement binary numbers. Give the answer in decimal.
011001101111
111010111011