Write all the four-digit numbers where the digit in the thousands place is $4$ times the digit in the units place, the digit in the hundreds place is $3$ times the digit in the ones place and the digit in the tens place is $2$ times the digit in the ones place.

Make the smallest $6$-digit number using the digits $5, 2, 8,$and $7$.

Mark the correct alternative in the following.

The largest $5-$digit number using any one digit twice from digits $6, 8, 3, 1$is:

Use all the digits only once and form the smallest $6$-digit number.

$5, 1, 6, 3, 8, 9$

Make the smallest $6$-digit number by using the digits $1, 6, 3, 5, 0, 7$ only once.

 Use all the digits only once and form the smallest $6$-digit number.

$4, 1, 7, 3, 5, 2$