How can I check if a binary number is an even number. So, the binary has a 0 remainder when divided by 2. How do I do this, using any bit shifts or logic gates?

2c. 11101 * 11101 is incorrect because the professor told me:  In 2’s complement you must sign extend. I have to do it again. Please you can give the correct answer

Multiply the numbers 0.7510 and -0.437510 in binary using the binary floating-point multiplication algorithm, assuming that we keep 4-bits of precision. Show your work on Add exponents, Multiply significands, Normalize the result & check for overflow/underflow, Round and normalize if necessary, and Determine sign of result from signs of operands