Convert the following octal numbers to binary:

(a) 7642

(b) 7015

(c) 3576

(d) 705

(a) 7642

Therefore, (7642)₈ = ($\bold{\underlinesegment{111}}\medspace\bold{\underlinesegment{110}}\medspace\bold{\underlinesegment{100}}\medspace\bold{\underlinesegment{010}}$)₂

(b) 7015

Therefore, (7015)₈ = ($\bold{\underlinesegment{111}}\medspace\bold{\underlinesegment{000}}\medspace\bold{\underlinesegment{001}}\medspace\bold{\underlinesegment{101}}$)₂

(c) 3576

Therefore, (3576)₈ = ($\bold{\underlinesegment{011}}\medspace\bold{\underlinesegment{101}}\medspace\bold{\underlinesegment{111}}\medspace\bold{\underlinesegment{110}}$)₂

(d) 705

Therefore, (705)₈ = ($\bold{\underlinesegment{111}}\medspace\bold{\underlinesegment{000}}\medspace\bold{\underlinesegment{101}}$)₂