1. What is the correct answer for this given:

• 

  

• 

  

• 

  None of the above.

2. What is the correct answer for this given:

• 

  e^y − ln (e^y + 1) + C

• 

  e^y + ln (e^y − 1) + C

• 

  2 e^y − ln (e^y − 1) + C

3. What is the correct answer for this given:

4. What is the correct answer for this given:

• 

  

• 

  

• 

  All of the above.

5. What is the correct answer for this given: