A statistical program is recommended. Consider the following time series. Quarter Year 1 Year 2 Year 3 1 71 68 62 2 48 40 50 3 57 59 52 4 77 80 71 (a) Construct a time series plot. A time series plot contains a series of 12 points connected by line segments. The horizontal axis is labeled: Year/Quarter. There are 12 tick marks on the horizontal axis which have been divided up into 3 groups of 4 tick marks. The groups are labeled, from left to right: Year 1, Year 2, Year 3.