Prac 3 - pogs0004

URL for prac3 - pogs0004
https://github.com/pogs0004/se3prac3
pogs0004 - prac5

My URL for prac5
https://github.com/pogs0004/se3prac3/blob/master/Prac5_2048TestPlan.md
Merge pull request #138 from pogs0004/patch-2

Prac 3 - pogs0004
Merge pull request #140 from pogs0004/patch-4

pogs0004 - prac5
Update prac6checkpoints.txt
Merge pull request #131 from andresva700/master

checkpoint Number 8 for vald0002
Update prac5checkpoints.txt
Update prac3checkpoints.txt
Update prac4checkpoints.txt
Update prac5checkpoints.txt
Update prac8checkpoints.txt