7. A random sample of 100 customers was chosen in UMUC MiniMart between 3:00 and 4:00 PM on a Friday afternoon. The frequency distribution below shows the distribution for checkout time (in minutes). (Show all work. Just the answer, without supporting work, will receive no credit.) Checkout Time (in Cumulative Relative Minutes) Frequency Frequency 1.0 - 1.9 8 2.0 -2.9 22 3.0 -3.9 0.84 4.0 -5.9 0.98 6.0 -6.9 1.00 Total 100 (a) Complete the frequency table with frequency and cumulative relative frequency. Express the cumulative relative frequency to two decimal places. (b) What percentage of the checkout times was less than 3 minutes? (c) Which of the following checkout time groups does the median of this distribution belong to? 1.0 - 1.9, 2.0 - 2.9, 3.0 - 3.9, 4.0 - 5.9, or 6.0 - 6.9? Why