Hi -- More information would help. If you could answer the questions in the "How to Ask for Help" posting stickied above, that would help a lot.
That said, you might want to Google "Jorge Cervantes nutrient deficiency chart." Yellowing like that -- "chlorosis" -- has lot of causes, but is often caused by not enough nitrogen. Just applying some balanced fertilizer might well fix the problem.
That kind of curling can be caused by too much heat / too low humidity, which in my experience is often caused by lights being too close and/or ventilation problems (both too much wind or too little). What is your temp and relative humidity?
