Seven months of prices for the company are shown below.

12/31/2019 68.04

1/31/2020 76.3

2/28/2020 105

3/31/2020 146.12

4/30/2020 135.17

5/28/2020 163.55

6/30/2020 253.54

1- Find the return for April

2- find the average monthly return for the six month period January-June 2020.

3- find the standard deviation of monthly returns for the period January-June 2020