Create a Box Plot for employee satisfaction and last evaluation,
each broken out by the variable left. This meaning that for each
variable there will be two box plots, side by side, where each box will
represent the same variable, but one filtered for left = 0, and the
other left = 1.
1.a. Box plot for employee satisfaction.

1.b. Box plot for employee last evaluation.

2. Create a correlogram, only for continuous variable

The correlogram shows a weak positive correlation between average
monthly hours and number of projects, and weak negative correlations
between time spent with the company and average monthly hours, number of
projects, and last evaluation score