1. Scenario: Jack and Jill are two siblings. Jack's father asked him how much he would offer to Jill if he gives him $50 as pocket money. He also told Jack that if Jill refuses the offer Jack makes, neither of them will get any money.

Refer to the scenario above. A player should use ________ to play this game.

a forward induction

b backward induction

c mixed strategies

d his dominated strategy