If you have $3,000 invested in securities, of which $500 is in Treasuries with an average return of 0.5%, $1,200 is in a blue chip bond mutual fund with an average return of 4.5%, and the rest is in an international stock fund with an average return of 15%, what is the weighted average return on your entire portfolio? 1.3% 7.6% 54% 8.4% 6.1%