Part a$)$ A computer maintains memory alignment. At what addresses can we store a byte variable? What about a $16-$bit variable?

Part b$)$ A computer maintains memory alignment. Show how the variables below are stored in the memory if they have to be stored in the order they are declared $(x,f,y,g,z),$ starting at address $400.$ Show the value at each address $($including empty spots$).$

unsigned char $x$;$\frac{,}{\frac{?}{?}}8-$bit variable

short int f; $//16-$bit variable

unsigned char $y$;

short int g;

unsigned char $z$;