1. In the following equation, one of the left-side numbers; however, we do not know which one, is encoded with the 2's complement notation, and another one with the sign and magnitude (SM) notation. Knowing that the result is encoded with the binary-coded decimal (BCD) notation, find decimal values of all three numbers. Explain your reasoning. (17 points)
1001 0111 - 1000 1010 = 1001 0101$_{BCD}$