Two streams merge to form a river. One stream has a width of 8.5 m, depth of 3.1 m, and current speed of 2.3 m/s. The other stream is 6.5 m wide and 3.5 m deep, and flows at 2.7 m/s. If the river has width 11.4 m and speed 2.7 m/s, what is its depth? Number i Units