can you please help me with 3 picture questions according to the lab data i have

Theory Bernoulli's equation describes how the speed of a fluid at a point is related to the pressure, density, and column of fluid above that point. Bernoulli's equation Torricelli's theorem Mariotte's bottle is a cylinder in which three holes have been cut to allow water to flow out. The rate of water flow from each hole will depend upon the column of water above that hole, and can be measured by seeing where the water lands. 1. What does the term "first approximation" mean? 2. How accurate were your velocity calculations using Torricelli's Theorem? How do you think you can get a better "first approximation" mathematically? 3. In Step 6, you probably noticed that as time passed, the stream of water moved closer to the Mariotte's bottle. What caused this? 4. In class we discussed that the middle hole would have the maximum horizontal range and that the top and bottom hole, if equidistant would have the same horizontal range, was this true in the lab? 5. How did the discharge velocity change with depth? Was it different than what it should be in theory