1)
a) The intervals are 0-1 (without including 1), 1-2 (without including 2), and so on up to 4-5.
Then, from the list, there is 1 element in the first interval (0.5), 3 elements in the second interval (1, 1.2, 1.3), e elements in the third group, and so on.
The histogram is then shown below
b) The shape of the histogram is bimodal because it has two distinct peaks in intervals 2-3 and 4-5.
c) As shown in the histogram, the interval with the highest frequency is 4-5.