Question $7$

Let's suppose algebra, physics, chemistry, biology and

calculus are the courses of

study in the college. And let's say that following pairs

have common

students :

$1.$physics and calculus

$2.$physics and chemistry

$3.$chemistry and physics

Problem: Say physics and chemistry both courses have

to miss at least one

exam. They can't take both at same time. How do we

schedule

exams in minimum no of days so that courses having

common

students are not held on same day? Explain the

problem by coloring the graph. You can choose your

own colors according to the subjects.

If you are using paper and pen take the screenshots of

your work and upload.