A wireless provider has a support center customers can call to get questions answered about their cell phone accounts. The manager in charge of the support center recently conducted a study in which he surveyed 3,000 customers. The customers who called the support center were transferred to a third party, who asked the customers a series of questions. Complete parts a through c below. a. Indicate whether the data generated from this study will be cross-sectional or time series. Explain why. The data will be [Select] because the values were observed at [ Select) in time. The year-end net income (in millions) for a company for the years 2004-2015 are shown in the provided data set (incomedata.xlsx D). Choose the best chart below which effectively displays the income data over time