The number of contaminating particles on a silicon wafer prior to a certain rinsing process was determined for each wafer in a sample of size 100, resulting in the following frequencies:

(a) What proportion of the sampled wafers had at least one particle? At least five particles? (Round answers to two decimal places.)

(b) What proportion of the sampled wafers had between five and ten particles, inclusive? Strictly between five and ten particles? (Round answers to two decimal places.)

(c) Draw a histogram using relative frequency on the vertical axis.