Determining fifth number - given 5, 13, 28 and 44

Basic information

        Balls drawn         Richard's success
# 4     26 35 38 43 47 49   second ticket: two matches, one off by three
# 8     02 05 21 22 25 32   one match
# 9     07 17 23 32 38 42   one match

Numbers 5 13 28 and 44 selected
Choose one from 36 42

Second ticket

Looking at Richard's second ticket for lottery 4, we need two matches from
25 34 37 42 46 48
None of the known numbers apply, and neither does 36. Hence 42 must be selected. This also satisfies the requirements for lottery 9.

From lottery 8, we cannot use 25 since 5 is already known to be selected (and we only want one match). Any of the other four are possible.

Current status

We now have
5 13 28 42 44
one from 34 37 46 48

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