In question 60, the base change property was used.
This property says that:

Remember that the base of the neperian logarithm (ln) is the number of euler "e"

So:

Option C
In question 62, use the base change property again. We have:

Let's change the
to the
So:
----------- lower the exponent in the numerator
) and calculate the log of the denominator.


Answer:
Option E