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.
I am seeing this around me a lot. Leaving the tea bag in the cup for a long time is really not taking good care of your tea. Each tea has a certain brew time and after that the tea will not taste anymore as intended. In particular the dust in tea bags has an ultra short brewing time - in particular for black teas. The tea will start tasting bitter.