Mean and standard deviation questions statistics class

6. If systolic blood pressure for a study involving hypertensive patients is distributed normally with a mean of 144.1 and a standard deviation of 4.7... a) what are the correct symbols for 144.1 and 4.7? b) are 144.1 and 4.7 parameters or statistics? are they sample values or population values? c) what is the probability of drawing a patient from this study at random and getting a systolic blood pressure greater than 150? d) if we were to draw 10 patients at random, what is the probability exactly 2 of them would have a blood pressure greater than 150