Heal the Bay is an environmental organization that releases an annual beach report card based on water quality. The 2019 ratings for 14 beaches (1 is the best and 7 is the worst).

A. Construct a dotplot graph according to the following rate: 1,3,3,1,2,7,4,2,2,2,2,2,3,4. What rate is higher according to the dotplot?_____.

(Please make the table including class limit, boundary, frequency)

B. Construct a histogram by using a single number. What is the shape of histogram?(Symmetric, Positive skewed, or negative)______. Is there any gap? If yes where?_________.