A medical student at Brock University is conducting research on a new drug to help patients with Alzheimer's. According to her data, the concentration, in milligrams per cubic centimetres, t hours after the injection is given by

g(t) = 2t³ + 21t² 36t + 78

Note: Use interval notation (a,b) (c,d), and for no interval enter . The (union) and (empty set) symbols are found in the CalcPad on the right in Sets.

Q8343887166 18MAR22

(a) The interval where g(t) is increasing is

(b) The interval where g(t) is decreasing is

(c) The interval where g(t) is concave up is

(d) The interval where g(t) is concave down is