(a) [3 marks] Represent the decimal numbers 4,3,2,1,0,1,2, and 3 to binary numbers using 2's complement. (b) [5 marks] Given the 4 bits 2's complement binary numbers 1110,0010,0000,1111, and 1000 , find the corresponding decimal integer number. (c) [3 marks] If (0101)2+(27)8=(p)10, Then p= ? (d) [5 marks] Convert (3.1)5 to an octal number. (e) [4 marks] Perform the subtraction: (621)8(164)8