The program CA combines the marks for two assessments $$assign$1$

and $$assign$2$ mark into a single grade. The marks value for both

assignments is an integer. If the marks for either assignment is less

than $50\%$ then the grade returned is a $$Fail$.$ To pass the CA with a

$$Pass$,$ C$,$ the student must score between $50\%$ and $60\%($inclusive$)$ in

$$assign$1$ or $$assign$2.$ They will pass the course with at least a $$Pass$,$

B$,$ if they score greater than $60\%$ in both $$assign$1$ and $$assign$2.$ In

addition to this, if the average of $$assign$1$ and $$assign$2$ is $80\%$ or more,

then they are awarded a $$Pass$,$ A$.$ An input values that is less than $0$

or greater than $100$ for either assignment is invalid, and the program

will return a message: $$Marks out of range$.$