Calculate the monthly holding period return for each month for each stock. (Use properly labeled and titled columns; use adjusted closing price when calculating holding period returns).

BlackBerry Limited. Stock

Date	Open	High	Low	Close	Adj Close	Volume
2017-01-01	9.24	9.69	9.08	9.18	9.18	19158200
2017-02-01	9.22	9.87	9.06	9.23	9.23	15326000
2017-03-01	9.33	10.75	8.98	10.3	10.3	27379700
2017-04-01	10.5	12.78	10.02	12.75	12.75	39165900
2017-05-01	12.76	15.54	12.62	14.28	14.28	41114700
2017-06-01	14.42	15.82	12.6	12.96	12.96	73114200
2017-07-01	12.86	13.08	11.67	11.69	11.69	27405900
2017-08-01	11.69	12.06	10.66	11.57	11.57	24031000
2017-09-01	11.59	14.14	10.94	13.95	13.95	44329100
2017-10-01	13.91	14.71	13.63	14.12	14.12	35325800
2017-11-01	14.16	14.24	12.86	13.92	13.92	24406900
2017-12-01	13.85	15.87	12.93	14.04	14.04	38156700

please show steps!