If wall is called window,window is called door,door is called floor,floor is called roof and roof is called ventilator,what will a person stand on?

In a certain code language,$35796$ is written as $44887$. How is $46823$ written in that code?

In a certain code language $24685$ is written as $33776$. How is $35791$ written in that code?

If $PEOPLE$ is coded as $PLPOEE$,how is $TREND$ coded?

In a certain code,$4$ il be pee $9$ means 'roses are blue',$sik$ hee $9$ means 'red flowers' and $pee$ mit hee $9$ means 'flowers are vegetables'. How is 'red' written in that code?

In a code language,$PINK$ is written as $QHOJ$ and $BOLT$ is written as $CNMS$. How would $MUST$ be written in that code?