Consider an order handling process with different causes of errors and the corresponding frequencies as in the table below. Cause of errors Frequency of resulting errors Browser error 45 Order number out of sequence 17 Products shipped, but credit card not billed 9 Order entry mistake 19 Products shipped to billing address, not shipping address 37 Wrong model shipped 24 (a)[1] Sort the frequencies from the highest to the lowest values. (b)[1] Calculate percentages and cumulative percentages. (1 decimal, e.g. 23.4%) (c)[1] Manually draw a Pareto diagram of the percentages, which includes a percentage ogive. (d) [1] What cause(s) of errors should the company focus on? (discuss your opinion) (e)[1] Use Excel to draw a Pareto diagram of the percentages with a percentage ogive