$8\mathrm{.}6$ LAB: Moving average

Write a program that outputs the $4-$MA series for the Expense column of the Heating.csv dataset.

The output should be:

$0$ NaN

$1$ NaN

$2$ NaN

$3119\mathrm{.}00$

$4120\mathrm{.}50$

$5120\mathrm{.}75$

$6121\mathrm{.}00$

$7123\mathrm{.}50$

$8124\mathrm{.}75$

$9124\mathrm{.}75$

$10124\mathrm{.}75$

$11122\mathrm{.}75$

$12120\mathrm{.}25$

Name: Expense, dtype: float$64$