cost and costing systems

This is a management accounting/cost and costing systems task.

It has 5 questions that must be answered in full

Have knowledge in regression analysis

Written answers and calculation (show your working)

Written should be 150 – 200 words and reference where appropriate.

Topic cover and fomular in textbook chapter 3.
Question on page 119.
C.42

Textbook Link https://1drv.ms/b/s!Ajp-vMLRErDhfQ8TTwculaXbM0M

If the link does not work, let me ASAP