An investment company intends to invest a given amount of money in three stocks.

The means and standard deviations of annual returns are as follows:

Stock	Mean	Standard Deviation
1	0.14	0.20
2	0.11	0.25
3	0.15	0.08

Stock Coorelation among annual returns
Stocks 1 and 2	0.5
Stocks 1 and 3	0.8
Stocks 2 and 3	0.1

Construct the efficient frontier for portfolios of these stocks. Please explain the involved steps in your modeling and construction.