Using the graph of below, answer the following questions.

a) Where is ?    (Enter an interval or a union of intervals.)

b) Where is ?    (Enter an interval or a union of intervals.)

c) Where is ?    (Enter a list of values, separated by commas.)

d) Where is increasing?    (Enter an interval or a union of intervals.)

e) Where is decreasing?    (Enter an interval or a union of intervals.)

NOTE: When using interval notation in WeBWorK, remember that: use 'U' for multiple intervals, for example if you are increasing on both intervals and then write as: .