Answer
(a) $1$
(b) $0$
(c) $5$
Work Step by Step
RECALL:
(1) $\log_b{b}=1$
(2) $\log_b{1}=0$
(3) $\log_b{b^x}=x$
(a) Use rule (1) above to obtain:
$\log_2{2}=1$
(b) Use rule (2) above to obtain:
$\log_5{1}=0$
(c) Use rule (3) above to obtain:
$\log_6{6^5}=5$