Profit and loss: The profit of DeBartolo Construction Inc. is illustrated by the graph sho...

Profit and loss: The profit of DeBartolo Construction Inc. is illustrated by the graph shown. Use the graph to estimate the point(s) or the interval(s) for which the profit P was:

a. increasing

b. decreasing

c. constant

d. a maximum

e. a minimum

f. positive

g. negative

h. zero