Given five memory partitions of $400KB,500KB,200KB,300KB,$ and $600KB($in

order$).$ Draw the picture of the final contents of memory partitions when a newly

allocated process with $180KB$ in size comes to the main memory if the system uses

each of the following memory placement strategies. $(9$ points$)$

a$)$ First fit

b$)$ Best fit

c$)$ Worst fit