i noticed, what appears to be typo errors in exercise 5 and 8
exercise 5 shows: b7 -> 6 resolving to 5 -> 2 resolving to 3 ….
since exercise 5 is Lower UA for 3 and 5, i believe it should show:
b7 -> 4 resolving to 5 -> 2 resolving to 3 ……
similarly, for exercise 8 Upper UA for 1 and 5
it shows:
2 resolving to 1 -> 3 -> 5 -> 1 resolving to b7
i believe this should be:
2 resolving to 1 -> 3 -> 6 resolving to 5 -> 1 -> (to beginning)