Please help! Use binomial method 5.- National security requires defense technology to be able to detect projectiles or o

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Please help! Use binomial method
5.- National security requires defense technology to be able to
detect projectiles
or offensive missiles. For this defense system to be successful,
multiple screens are required
of radar. Assume that three independent screens will be used and
that the probability that
anyone detecting an offensive missile is 0.7. Clearly, if no
display detects a
offensive missile, the system does not work and needs to be
improved. (NOTE: You are not allowed to use the
tables in this problem).
a) What is the probability that neither screen detects an offensive
missile?
b) What is the probability that only one of the screens detects the
missile?
c) What is the probability that at least 1 of the 3 screens will
detect the missile?