4.) Convert the following:

a.) The hexadecimal number 0x1A5 to a decimal number.

b.) The decimal number -1 to an 8-bit twos complement binary number.

c.) The decimal number -2 to an 8-bit twos complement binary number.

d.) The decimal number -3 to an 8-bit twos complement binary number.

e.) The decimal number -4 to an 8-bit twos complement binary number.