Suppose that g(x) is a function that is defined and differentiable for all real numbers x and that g(x) has the following properties:
(i) g(0)=5 and g'(0)=-5/6 .
(ii) g(7)=6 and g'(7)=6 .
(iii) g(x) is concave up for x<7 and concave down for x>7.
(iv) g(x)>_-15 for all x.
Use these properties to answer the following questions.
(a) How many zeros does g have?
(b) How many zeros does g have?