Based on a careful work study in the Richard Dulski Corp., the results shown in the following table have been observed:

Photocopying the results during observation $3$ was influenced by the photocopying machine being broken. Distributing the reports during observation $5$ was influenced by a power outage. Both of

these are included as delays in the allowance factor.

The allowance factor for this type of work is given to be $18\%.($Round all intermediate calculations to two decimal places before proceeding with further calculations.$)$

a$)$ The normal time for the "prepare daily reports" operation $=45\mathrm{.}84$ minutes. $($Round your response to two decimal places.$)$

The normal time for the "photocopy results" operation $=14\mathrm{.}38$ minutes. $($Round your response to two decimal places.$)$

The normal time for the "label and package reports" operation $=3\mathrm{.}60$ minutes. $($Round your response to two decimal places.$)$

The normal time for the "distribute reports" operation $=15\mathrm{.}75$ minutes. $($Round your response to two decimal places.$)$

The normal time for the overall process $=$

minutes. $($Round your response to two decimal places.$)$

b$)$ The standard time for this process $=97\mathrm{.}03$ minutes. $($Round your response to two decimal places.$)$

c$)$ The number of observations that are required for a $95\%$ confidence level within $5\%$ accuracy $=,.($Round your response to the immediate higher whole number.$)$