Answer the following social psychology questions

Answer the following social psychology questions.

1)Once we committed a lot of time or energy to a cause, it is nearly impossible to convince us that cause is unworthy. Why is that? Explain.

2)Why does dissonance reduction following a difficult moral decision cause people to behave either more or less ethically in the future? Explain.

3)Those who are unfaithful are more lenient towards unfaithfulness while those who resist the temptation to be unfaithful? Could this apply to relationships? Explian.   

4)Is "justification effort" a benefit for people open to a varirty of activities and interpretations? Explain.

5)Which justification is the better; internal or external? Explain.