$[5]$ The KL$25$Z has $5$ ports $($PTA$-$PTE$),$ each port $32-$bits wide. Describe the mechanism that MCU designers use to expose as many ports as possible in an $80$ pin LQFP package?

$[5]$ Write a conditional test as a fragment of $C$ code that will test if bit $5$ of a $32-$bit variable is set.

#define TEST$\_$BIT $5$

int var; $//$ preloaded with a register value

bool conditional$\_$test $=$

if $($ conditional$\_$test $)\{$

$//$ bit $5$ is set

$\}$