Chapter 4.2, Problem 6E

Convert the binary expansion of each of these integers to an octal expansion.

a) ${\left(11110111\right)}_{\text{2}}$

b) ${\left(\text{1}0\text{1}0\text{1}0\text{1}0\text{1}0\text{1}0\right)}_{\text{2}}$

c) ${\left(\text{111 }0\text{111 }0\text{111 }0\text{111}\right)}_{\text{2}}$

d) ${\left(\text{1}0\text{1 }0\text{1}0\text{1 }0\text{1}0\text{1 }0\text{1}0\text{1}\right)}_{\text{2}}$