a$.$ If the main memory uses fixed size partitioning and the CPU uses first come first serve $($FCFS$)$ algorithm, assign the above mentioned processes considering the memory allocation algorithm to be

i$.$ First$-$fit

ii$.$ Best$-$fit

iii.$$ Worst$-$fit

b$.$ Assume, the main memory uses variable size partitioning and the CPU uses shortest job first $($SJF$)$ algorithm, assign the processes considering the three memory allocation algorithms mentioned above.

Find the total amount of internal and external fragmentation in both the above cases in each of the memory allocation algorithms individually.