Compute the following mentally. Remember that $\ln x = \log_e x$.  

1. $\log(1)$ 

   Hint (a):

   $10^?=1$

2. $\ln(1)$ 

   Hint (b):

   $e^?=1$

3. $\log(10^3)$ 

   Hint (c):

   $10^?=10^3$

4. $\ln(e^3)$ 

   Hint (d):

   $e^?=e^3$