This is version 10 of the Problem Solving Assignment.  I have corrected the following errors in my addition of part 4a.
Upon completing my last version I discovered that I included the answer for part 4b in the 4a section.
 I then cut out this segment and added it to section 4b where it belongs. The following is the text that was relocated to part 4b from 4a.

"In any case I believe this solution does minimize the risk involved in transporting the cargo across the river.  The text does state that the cat could eat the bird and the bird would eat the seed, from that context I have determined that for a short time the cat and parrot could remain together as the bird can fly away from the cat out of reach.  The seed on the other hand is the most important factor as it cannot get out of the birds reach without being moved."