You have been given a sample data set related to sales revenue and advertising expenditure in Dian packaging Sales Revenue ($ 000) Advertising expenditure ($ 000) 35 7 37 8 45 10 47 12 51 12 55 11 60 15 72 16 75 18 74 20 Use the above data to answer the questions given below; i. Calculate mean of sales revenue and advertising expenditure ii. Calculate Standard deviation of sales revenue and adverting expenditure iii. Calculate correlation coefficient between above two variables and interpret the meaning