Consider the following sales data, in millions of dollars:

2013 2015 1st quarter 152 1st quarter 217 2nd quarter 162 2nd quarter 209 3rd quarter 157 3rd quarter 202 4th quarter 167 4th quarter 221 2014 2016 1st quarter 182 1st quarter 236 2nd quarter 192 2nd quarter 242 3rd quarter 191 3rd quarter 231 4th quarter 197 4th quarter 224 Plot these data. Based on your visual observations, what time-series components are present in the data?