I need help with these two! ive tried everything, please show work. I need to learn these, Thank you!

2) Show the decimal equivalent of each of the numbers if they are interpreted as (4 answers): 11101010 01011101 a. Unsigned binary b. Signed binary 3) Subtract the two pairs of numbers. Show the operand and the results in decimal and binary. (Indicate if there is or is not overflow for all 4 answers) a. Assuming there are unsigned b. Assuming they are signed 1001-1010 1110-0110