Maria has a portfolio consisting of 7 shares of stock A (purchased for $70 per share) and 4 shares of stock B (purchased for $100 per share). She assumes the expected rates of returns after 1 year will be 0.02 for stock A and 0.15 for stock B, with variances of 0.04 and 0.18, respectively. The expected rate of return after 1 year for Maria's portfolio is . (Hint: For best results, retain at least four decimal places for any intermediate calculations.)