I need help with this question thanks!

50 40 30 20 10 -10 10 20 30 40 50 60 Alexei is a lifeguard and spots a drowning child 60 meters along the shore and 50 meters from the shore to the child. Alexei runs along the shore for a while and then jumps into the water and swims from there directly to the child. Alexei can run at a rate of 4 meters per second and swim at a rate of 1 meter per second. How far along the shore should Alexei run before jumping into the water in order to save the child? Round your answer to three decimal places