Given the objects below, write the result for each assignment.

constant v: bit :$=1$;

signal y: bit$\_$vector $(1$ to $4)$;

signal z: std$\_$logic$\_$vector $(7$ downto $0)$;

y $<=($others $=>0)$; $--$ result: $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

y $<=(4=>1,$ others $=>0)$; $--$ result: $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

y $<=(1,$ others $=>0)$; $--$ result: $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

y $<=(4=>1,2=>$ v$,$ others $=>0)$;$--$ result: $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$