The data show the number of vacation days used in a recent year by a sample of 12 employees. 0859610627323 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. (Type integers or decimals. Use ascending order.)