By Phil Franz-Warkentin Glacier FarmMedia MarketsFarm – The Canadian dollar strengthened on Friday, hitting its highest level in two weeks relative to its United States counterpart. The Canadian dollar settled at US$0.7316 or US$1=C$1.3668 on Friday, which compares with Thursday’s close of US$0.7305 or US$1=C$1.3689. Comments from United States Treasury Secretary Janet Yellen were