The random variable x denotes the number of automobile accidents on a certain stretch of highway in a 24-hr period. A research analyst developed the ff probability distribution for x. Set-up the cumulative distribution function in table form. What is F(4)?

0.15 if x = 0 f (x) = 0.05x2 if x = 1,2 k(6 - x) if x =3,4,5