mistakes hw 4

In the set of solutions that I wrote to hw 4 there are two mistakes, but I don't want to waste paper and print new copies of the solutions, so I'll just post here the corrections. 1 In exercise number 7.2.1 part d the element in the second raw and first column should be 14, not 7 as I wrote. 2 In the first additional exercise part b all the directions that I draw should be rotated counterclockwise by 90 degrees. So for example for R bigger then 4 and F bigger then 1.5 the answer would be Up Left instead of Up Right etc.