A piranha-infested river runs from west to east, as depicted in Figure 2.4. Sarah Connor is living off the grid 3 km north of the river and does not have access to fresh water. Following a recent impaling, she is unable to walk. Her survival is vital for the future of humanity. Each day Kyle Rees, who lives 2 km north of the river and 12 km west of Sarah Connor, must travel from his hideout with a bucket, which he fills with water from the river. He must save as much energy as possible for the fight against the machines. What is the minimum distance he needs to travel to get to Sarah's house via the river? Kyle's hideout 2 km Piranha-infested river 12 km Sarah's house 3 km Figure 2.4: Sarah Connor's house and Kyle Rees' hideout