The x intercepts of the graph of f(x)= x(x+1)(x-5)(x-7) are {0 or 1}, {-1 or 1}, {5 or -5} & {7 or -7}?

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?