Listed below are the number of cups of coffee 25 students in a college statistics class said they drink per week. 

1, 14, 4, 13, 10, 14, 10, 5, 18, 21, 26, 20, 10, 6, 1 ,7, 10, 1, 12, 2, 3, 16, 14, 5, 7 

a. Find the median, quartiles, and IQR for the number of cups. Provide a one-sentence summary of the IQR. 

b. Are there any outliers in the dataset according to the 1.5 × IQR method? 

c. Construct a boxplot for the number of cups. 

d. Is the distribution of number of cups of coffee symmetric, skewed to the large numbers, or skewed to the small numbers?