need help with the following question!

Problem 3) Recall that the binomial distribution is given by \"H. (I? Mac; n, 6) = ( )gr(1_ 9)\"!12' which has mean M? and variance n6(1 6). (1 point) (i) If X has distribution Mar; 8, 0.7) nd P(X = 5). (3 points) (ii) Use the normal distribution to approximate P[X = 3). (2 points) (iii) Find the probability that X lies within 1 standard deviation off the mean