Here is my problem: From the top of a cliff overlooking a lake, a person throws two stones, as shown in the drawing. The cliff is 15.4 m high. The two stones described have identical initial speeds of v0 = 18.0 m/s and are thrown at an angle θ = 26.7 °, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the water? Neglect air resistance. I think I have the correct steps.. but can't seem to get the right answer. I would like someone to walk me through how to solve this.

Here is my problem: From the top of a cliff overlooking a lake, a person throws two stones, as shown in the drawing. The cliff is 15.4 m high. The two stones described have identical initial speeds of v0 = 18.0 m/s and are thrown at an angle θ = 26.7 °, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the water? Neglect air resistance. I think I have the correct steps.. but can't seem to get the right answer. I would like someone to walk me through how to solve this.