Let’s assume that a Leader and a Follower meet. Four of their dimensions are measured on a scale of 1-9

Let’s assume that a Leader and a Follower meet. Four of their dimensions are measured on a scale of 1-9.

Leader: 7, 3, 2, 1

Follower: 5, 4, 2, 6.

What is the probability of interaction between the Leader and the Follower?