1.At the beginning of awalk, Roberto and Juanita are 7.7 miles apart. If they leave at the same time and walk in the samedirection, Roberto overtakes Juanita in 11 hours. If they walk towards eachother, they meet in 1 hour. What are theirspeeds?Roberto's speed is...................... mph.Juanita's speed is.............................................. 2.A boat takes 3 hours to go 9 miles upstream. It can go 18miles downstream in the same time. Find the rate of the current and the rate of the boat in still water.(Hint: Because the current pushes the boat when it is going downstream, the rate of the boat downstream is the sum of the rate of the boat and the rate of the current. The current slows down the boat when it is goingupstream, so the rate of the boat upstream is the difference of the rate ofthe boat and the rate of thecurrent.)The rate of the current is mile(s) per hour. 3.If a plane can travel 480miles per hour with the wind and 380 miles per hour against thewind, find the speed of the plane in still air.What is the speed of the plane in stillair?....................................miles per hour