Question 1

1.a Box plot: Satisfaction level vs Left

The low satisfaction level in the employees could indicate the resaon they left the company.

1.b Box plot: Last Evaluation vs Left

In the employees who left, the satisfaction levels do not look too low. But despite this fact, some employees have left.

Question 2

Correlogram for continuous variables

Employees who have not been promoted in last 5 years and who have been spending long hours at work are more likely to leave.