Measure "4 liter water" problem

We have two buckets, 1 of capacity 3 liter and another of 5 liter. We have 5 liters of water.

So how will we make combinations such that 1 bucket will have exactly 4 liters of water?
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Answer:

Let say Bucket B1 has capacity of 5 Liter and B2 has 3 Liter.)

1.) Full B1 bucket with water. ( B1-5L, B2-0L)

2.) Empty B1 into B2. (B1-2L, B2-3L)

3.) Empty B2 bucket. (B1-2L, B2-0L)

4.) Emty B1 into B2. (B1-0L, B2-2L)

5.) Full B1 bucket. (B1-5L, B2-2L)

6.) Empty B1 into B2. (B1-4L, B2-3L)