Convert the following decimal numbers to octal:

(a) 19

(b) 122

(c) 161

(d) 0.675

Convert the following decimal numbers to binary:

(a) 19

(b) 122

(c) 161

(d) 0.675

Convert the following binary numbers to hexadecimal:

(a) 10011011101

(b) 1111011101011011

(c) 11010111010111

Convert the following hexadecimal numbers to binary:

(a) 23D

(b) BC9

(c) 9BC8