Here are some numbers (all in million RMB yuans) from the income account for the city of Shanghai in 2017: labor compensation =14997, business profits=8780, depreciation of fixed assets =3924, net production taxes =5224, private consumption expenditure =12970, government consumption expenditures=4581, net exports =889. a) Calculate Shanghai's GDP in 2017 using the income method. b) Calculate the labor income's share in Shanghai's GDP. c) Calculate the investment rate in Shanghai