What is the answer for this I can’t find it pls help

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.