\begin{tabular}{c|c} NetIncome($Millions) & NumberofImporters \\ \hline$4 to under $8 & 2 \\ \hline 8 to under 12 & 3 \\ 12 to under 16 & 12 \\ 16 to under 20 & 7 \\ 20 to under 24 & 5 \end{tabular} The net incomes of a sample of large seller of paintings were organized into the table given on the next slide. (a) What is the table called? (b) Based on the distribution, what is the estimate of the arithmetic mean net income? (c) Based on the distribution, what is the estimate of the median net income? (d) Based on the distribution, what is the estimate of the standard deviation