The following are sample prices of houses in a particular neighborhood. Data (in thousands of dollars): 250, 321, 223, 298, 305, 217 a) Find the Mean, Variance and Standard Deviation of the data using formulas. Show your calculations or explain your work. (Round to 2 decimal places if needed) Hint: You may confirm your results with the TI-84 calculator, but you need to demonstrate how to calculate these using formulas.