You are considering investing in Australian shares and decide to investigate the shares of two Australian companies: Woodside Petroleum Ltd (WPL.AX) and Commonwealth Bank of Australia (CBA.AX).

Below are the opening prices, closing prices and dividends paid for WPL Ltd and CBA for the financial year 2018-2019.

Company	WPL		CBA
Month	Opening Price	Closing Price	Opening Price	Closing Price
Jul 2018	35.63	36.14	72.70	74.79
Aug 2018	36.00	36.87	74.38	71.24
Sep 2018	37.00	38.58	71.24	71.41
Oct 2018	38.44	34.85	71.13	69.23
Nov 2018	34.79	31.06	69.30	71.23
Dec 2018	31.30	31.32	72.06	72.39
Jan 2019	31.32	34.32	72.39	69.91
Feb 2019	34.25	36.25	69.23	73.95
Mar 2019	36.10	34.62	73.95	70.64
Apr 2019	34.65	35.39	71.00	74.52
May 2019	35.39	35.42	74.81	78.51
Jun 2019	34.50	36.36	78.06	82.78

WPL		CBA
Date	Dividend	Date	Dividend
23/08/2018	0.728022	15/08/2018	2.31
22/02/2019	1.27059	13/02/2019	2.00

Plot the efficient frontier of this two security universe (AMP and CSL) on a graph, include all data in a separate table and explain this graph. (Hint: Calculate return and SD of a series of portfolios starting from 100% WPL, 0% CBA to 0% WPL, 100% CBA and also include MVP.)