Plz give step by step answer..........

3. You have started a stock purchase plan, every quarter you will invest $2,400 in the stock of Transcanada Corporation. Your purchases are summarized below: Amount invested Purchase price per share 52,400 $20.00 $2,400 $24.00 $2.400 $25.00 $2,400 $30.00 Calculate the weighted average cost per share. (hint - what is the weight - write down the formula for cost/share what is the denominator) 4. You are thinking of accepting a position selling real estate. You have narrowed your choice to two companies. Mutton and Associates and ReMin. Your compensation for each position is based on commissions and you ask how much you should expect to receive. Both companies give you a sample of their sales persons' gross earnings for the last three months. Mutton 12,000 18,000 22,000 8,000 25,000 ReMin 16,000 20,000 16,000 15,000 18,000 a) Calculate the mean, median and mode for each company. b) Calculate the range of earnings for each company. c) Assume the data for ReMin is the population of quarterly earnings - calculate the variance and standard deviation. d) Calculate the sample standard deviation for each sample