Statistics and Probability

The probability that steam will condense in an aluminum tube at a pressure of 10 atm pressure is 0.4.

a) Find the probability that steam will condense in at most 3 of 12 of these randomly selected tubes.

b) If the steam does not condense in the tube, it costs 225 pesos in the process. If the process uses 20 such tubes, what is the expected cost and standard deviation of the cost in the process due to no condensation in the tubes?

Please send me answer fast