The data show the number of vacation days used in a recent year by a sample of 12 employees. 8 2 9 0 1 8 3 6 6 3 5 5 a. Obtain the quartiles. b. Determine the interquartile range (IQR). c. Find the five-number summary. a. Obtain the quartiles. Q1 Q2 Q3 (Type integers or decimals.) b. Determine the interquartile range. IQR= - (Type an integer or a decimal.) c. Find the five-number summary. IO Oo (Type integers or decimals. Use ascending order.)