c) find the descriptive statistics for each of the variables (income, food, house, time, inc1000, food100, perfood). specifically, only show the mean, standard deviation, minimum, maximum, total number of observation, and the median in your minitab output. d) create a time series plot of income (y-axis) over time (x-axis) by using the following minitab commands: graph>time series plot and then choose simple and add the series you want to plot.