Decimal number -47 can be converted to binary 8-bit two's complement number, which is a. 11010000 b. 01010000 c 11010001 a 11010011 2. Represent -47 (base-10) to a signed-magnitude format, the result is a. 11010000 b. 01010000 c 11011111 a. 10101111 3. The logic circuit shown in the diagram directly implements which of the Boolean expressions given below? ((xy)'(x + y)) b. ((x + y)'(xy'))