8. Rainbow Building Ltd has been in business for two years. As it is a relatively new firm in a competitive market, it is trying to deliver quality services at a low cost. Rainbow Building Ltd presents the following data for 2020 and 2021. E_EE_ __ Builder support capacity (number of jobs the firm can do) Total cost of labourer support $168,000 $180,000 Labourer support capacity cost per job $2,800 $3,000 Builder labour hour costs are variable costs. Labourer support costs are dependent on the Labourer capacity Rainbow Building Ltd chooses each year (that is the number ofjobs the firm can do each year). Labourer support costs do not change with the actual number of jobs each year. Required: 1) Is Rainbow Building's strategy one of product differentiation or cost leadership? Explain briefly. (1 mark) 2) Calculate the growth, price recovery and productivity components that explain the changes in operating income from 2020 to 2021. (5 marks) 3) How successful has Rainbow Building been in implementing its strategy? Explain. (2 marks) 4) Describe four key measures you would include in Rainbow Building's balanced scorecard. (2 marks) (Word limit: 50 words)