First time mom so just want to double check .. my son has been on 2 ounces of formula .. he’s 3 weeks d and the doctor said we can go up to 3 because he doesn’t even make it 2 hours crying to eat all day and night .. the formula container shows how to make 2-4 and 6 ounces .. to make 3 would it be 3 ounces water 1 1/2 scoops of formula ?