I need help and explain in details please

1) [4 points] Consider the 16-bit binary integer X=10010000 00000011 . Convert X to decimal if X is a. unsigned b. in sign-magnitude notation c. in one's complement notation d. in two's complement notation For problems 2 through 6 , assume all integers are in binary and in two's complement notation. Remember to indicate overflow if necessary. [Each question 2) through 6) carries 2 points] 2) 01101010+10011110=? 3) 10011111+10010001=? 4) 1000111100010000= ? 5) 0001001000101111=? 6) 1111101011101110=