Player II

$b_1$

$b_2$

$b_3$

$a_1$

(3, 4)

(2, 2)

(2, 1)

Player I

$a_2$

(2, 3)

(7, 1)

(7, 4)

$a_3$

(2, 1)

(5, 6)

(6, 6)