Olivia needs to access a point 3 km downstream on the opposite side of a straight, 6 km wide river. See diagram below. Start End She can row at rate of 6 km per hour and run at a rate of 12 km per hour. Olivia has a few basic options for this trip. She can row straight across the river and then run downriver to her destination. . She can row the entire distance to her destination. She can row to a point x km downriver and then run the rest of the way to her destination. How far downstream on the opposite side of the river should Olivia land, in order to minimize the amount of time required to arrive at her destination?