add cos333 prac 2

3/cos333/pracs/1/gnuplot/iris.data

3/cos333/pracs/1/gnuplot/iris.names

3/cos333/pracs/1/gnuplot/task1.plt

3/cos333/pracs/1/inform/task4.inform

3/cos333/pracs/1/logo/task3.lgo

3/cos333/pracs/1/research_questions/cos333___practical_1.pdf

3/cos333/pracs/1/research_questions/main.tex

3/cos333/pracs/1/research_questions/refs.bib

3/cos333/pracs/1/snap/task2.xml

3/cos333/pracs/1/specification.pdf