The graph of quadratic function fhas zeros of -8 and 4 and a maximum at (-2,18). What is the value of a in the function's equation?
a: 1/2
b: -3/2
c: -1/2
d: 7/2
20 pts !

Atown recently dismissed 5 employees in order to meet their new budget reductions. the town had 5 employees over 50 years of age and 19 under 50. if the dismissed employees were selected at random, what is the probability that exactly 2 employees were over 50? express your answer as a fraction or a decimal number rounded to four decimal places.