Sales manager wishing to predict the future sales.

Use Sales Data to perform the following:

1. Provide your comments on the sales trend.
2. Provide your comments on the sales seasonality.
3. Provide your comments on the obtained accuracy model.
4. Predict the upcoming 3 quarter sales.

Quarter	Sales
1	45,000
2	40,000
3	55,000
4	85,000
5	80,000
6	110,000
7	125,000
8	115,000
9	155,000
10	160,000
11	185,000
12	175,000
13	210,000
14	230,000
15	255,000
16	245,000
17	265,000
18	275,000