Electric cars, which accounted for 2.6% of global car sales and about 1% of global car stock in 2019, registered a 40% year-on-year increase. As the technology for vehicle electrification advances and the market for electric cars expand, more car manufacturers are exploring the possibility of manufacturing electric cars. (a) The inputs used in the production process of cars are labour, raw materials, and energy. Given the following scenario: To manufacture X + 10 petrol-driven cars, the labour cost is $20,000; raw materials cost is $30,000; and energy cost is $12,000. X is the last digit of your Student PI number. Example: If your Student PI number is W1234567, then X = 7 and the total number is 17. To manufacture the same number of electric cars, the electric car requires 20% less raw material and 50% less energy, but 30% more labour. Calculate the energy productivity and overall productivity for petrol-driven cars and electric cars. Which type of car will you recommend the company to produce? Why? (b) Explain how manufacturing electric cars can support environmental, social and economic sustainability. Provide examples to support your answer.