Cycle days 9,12,13 and 16 had intercourse,what are my chances to conceive?

Good timing, but: If you have regular ovulations and a 28-day cycle that timing should be perfect, if either of these is not true your chances are lower. It is impossible to tell "what" your chances are without knowing more info about you (and your partner.) If 42 years is correct age, politely your chances trying at home are not good, I recommend seeing a specialist for evaluation and help. Best wishes.