(a) Vector E has magnitude 17.0 cm and is directed 27.0° counterclockwise from the + x axis. Express it in unit–vector notation. (b) Vector F has magnitude 17.0 cm and is directed 27.0° counterclockwise from the + y axis. Express it in unit–vector notation. (c) Vector G has magnitude 17.0 cm and is directed 27.0° clockwise from the ─ y axis. Express it in unit–vector notation.