You are participating in multiple games involving two slot machines, labeled Z and K.
The two slot machines are different in different games.
Each time you choose a slot machine, you get points (choosing the same slot machine will not always give you the same points).
You select a slot machine by pressing the corresponding key.
The expected points change randomly, abruptly, and independently with a hazard rate (which you will be told).
When the points change, the new expected point value assigned to that slot machine is sampled from a uniform distribution (from 1 to 99 points).
For example, if the hazard rate is 0.1, the expected points of the machines change with 10%.
Your goal is to choose the slot machine that will give you the most points.

Game 1. The hazard rate is 0.4. There are 100 trials in this game.
You press <<Z>> and get 11 points.
You press <<K>> and get 44 points.
You press <<K>> and get 44 points.
You press <<K>> and get 90 points.
You press <<Z>> and get 65 points.
You press <<Z>> and get 65 points.
You press <<Z>> and get 57 points.
You press <<K>> and get 91 points.
You press <<K>> and get 91 points.
You press <<K>> and get 91 points.
You press <<Z>> and get 41 points.
You press <<Z>> and get 47 points.
You press <<Z>> and get 80 points.
You press <<Z>> and get 80 points.
You press <<Z>> and get 80 points.
You press <<Z>> and get 80 points.
You press <<K>> and get 8 points.
You press <<K>> and get 8 points.
You press <<Z>> and get 14 points.
You press <<K>> and get 3 points.
You press <<Z>> and get 14 points.
You press <<K>> and get 77 points.
You press <<K>> and get 77 points.
You press <<K>> and get 77 points.
You press <<K>> and get 77 points.
You press <<K>> and get 77 points.
You press <<Z>> and get 43 points.
You press <<K>> and get 24 points.
You press <<Z>> and get 45 points.
You press <<K>> and get 26 points.
You press <<K>> and get 26 points.
You press <<Z>> and get 45 points.
You press <<K>> and get 29 points.
You press <<Z>> and get 64 points.
You press <<Z>> and get 95 points.
You press <<Z>> and get 95 points.
You press <<Z>> and get 95 points.
You press <<K>> and get 41 points.
You press <<Z>> and get 95 points.
You press <<Z>> and get 51 points.
You press <<Z>> and get 42 points.
You press <<K>> and get 35 points.
You press 