Required information

Problem $9\mathrm{.}2($Algo$)$

$[$The following information applies to the questions displayed below.$]$

An air$-$conditioning repair department manager has compiled data on the primary reason for $41$ service calls

previous week, as shown in the table.

Click here for the Excel Data File

Note: The order of defects listed in Parts $(1)$ and $(2)$ may be different.

Problem $9-2$ Part a $($Algo$)$

a$.$ Using the data, prepare a check sheet for the problem types for each customer type.

$(1)$ Residential customer type

$(2)$ Commercial customer type