Suppose that many stocks are traded in the market and that it is possible to borrow at the risk-free rate, r. The characteristics of two of the stocks are as follows:

Stock	Expected return	SD
A	9%	60%
B	5%	40%

Correlation = 1

Calculate the expected rate of return on this risk-free portfolio? (Hint: Can a particular stock portfolio be formed to create a synthetic risk-free asset?) (Round your answer to 2 decimal places.)