6- A company provides maintenance service for washing machines in Victoria. The collected data are presented in the Excel file (second worksheet). 

a) Assume the manager asked you to analyse the data and provide him some insights and recommendations.

b) Build a multiple regression model to predict the repair time for a future booking service than needs to be done by John and it is an Electrical repair. Do you suggest this service to be assigned to the morning shift or afternoon shift?

c) What other data you recommend to the manger to be added into this dataset in future for better analysis and what kind of analysis you think will be useful based on them.