Write the Word or Phrase That Best Completes Each Statement $f ( x ) = \ln x$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
-Given $f ( x ) = \ln x$ , evaluate the following.
(a) $f \left( e ^ { 6 } \right)$
(b) $f \left( e ^ { \ln 3 } \right)$
(c) $f \left( e ^ { 5 \ln 3 } \right)$