1251, 3043, 5921
a) convert the above decimal numbers directly to binary
b) convert the numbers to octal first and then to binary
c) convert the numbers to hexadecimal first and then to binary
d) add the decimal values 1251 and 3043 using their binary, octal, and
hexadecimal representations.
e) subtract the decimal value 1251 from 3043 using their binary, octal, and
hexadecimal representations