Consider an externality between a beekeeper and almond prodcution from an almond orchard. It costs the…

Consider an externality between a beekeeper and almond
prodcution from an almond orchard. It costs the beekeeper $25 to
maintain each beehive. If the beekeeper places her hives near the
almond orchard almond production increases by $10 per hive. The
benefit to the beekeeper from placing her hives near the almond
orchard is $50 for the first hive, $40 for the second hive, $30 for
the third hive, $20 for the fourth hive, $10 for the fifth hive and
$0 for any subsequent hives. If the almond orchard buys the
beekeeping operation (that is, the two activities are performed by
the same firm) what is the number of hives that will be placed near
the almond orchard?
(a) 1
(b) 2
(c) 3
(d) 4
(e) 5