A mechatronics engineer works to automate the transfer of materials and goods, and the manufacturing process. Their tasks involve identifying areas for task automation, designing, developing and testing potential mechatronic devices, and implementing design solutions.
A typical tea bag has somewhere between a gram and two grams of stuff in it. If the entire contents were nothing but fructose, and that fructose completely dissolved when you made your tea, you'd consume between 4 and 8 calories (carbohydrates contain 4 calories per gram) per cup of tea -- so that's the ceiling.
The general rule of thumb is one tea bag per cup, or eight ounces, of tea; however the type of tea you use and how you brew it may require more or less. Experiment with the different methods of brewing iced tea using the initial recommended number of tea bags then add or remove a bag based on your taste preferences.