graduating seniors during their college career

(a) Construct a frequency distribution for the number of difference residences occupied by graduating seniors during their college career, namely

1, 4, 2, 3, 3, 1, 6, 7, 4, 3, 3, 9, 2, 4, 2, 2, 3, 2, 3, 4, 4, 2, 3, 3, 5

(b) What is the shape of this distribution?