Task $4$: Time$-$Based Data Analysis of Monthly Sales Data

As part of a business analytics course, you are required to analyze the monthly sales data of a company to understand the sales trend and make future sales predictions.

Given the time$-$based dataset below, perform a time series analysis.

Months:

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec Sales:

$120$

$135$

$150$

$160$

$155$

$170$

$175$

$180$

$165$

$155$

$150$

$145$

Determine and interpret key time series metrics $($e$.$g$.,$ trend, seasonality$).[$