1. There is a dominant strategy equilibrium in this situation.
Han will play 'Limit price' and Coa will play 'Limit price' as well.
Thus, the dominant strategy equilibrium is $1.5 billion, $3 billion.
2. The Nash equilibrium will be the same as the dominant strategy. This, it occurs when both play 'limit price'.
c- Is there a Nash equilibrium in this problem?
d-If there is a Nash equilibrium, what is it?