This has to be the worst "do my homework for me" ever. Just dump the picture with the assignment and not even a single line of personally added text.
Quit right now and just apply to Burger King straight away, it will save you lots of time and money.
I don't understand what hamburgers have to do with infix expression evaluation ...
Jos (<--- quite stupid without espresso in the morning)
Flipping burgers does not require thought, and not thinking is apparently what the OP wants to do. See? Perfectly reasonable logic.