Assume the following probability distribution of daily demand for bushels of strawberries:

Further assume that unit cost is $3 per bushel, selling price is $5 per bushel, and salvage value on unsold units is $2. We can stock 0, 1, 2, or 3 units. Assume that units from any single day cannot be sold on the next day. Build a decision tree and determine how many units should be stocked each day to maximize net profit over the long haul.