I have an assignment in Science and I really need your help :))

it says, Design a procedure to separate the components of each mixture.
Mixture 1: marbles, sugar, sand and iron filings.
Mixture 2: ethanol, vegetable oil, and pebbles.
Mixture 3: salt solution

it should have the Technique, Materials and Procedure :))
it will be passed tomorrow

For separation of any components from their mixtures We should about their physical and chemical properties which makes separation easier.
Like:
Mixture 1: 
Iron is a magnetic solid which is insoluble in water.
Sugar is a non-magnetic solid which is soluble in water.
Sand is a non-magnetic solid which is insoluble in water.
Marble is a fine big particle can be easily discovered thereafter.

Procedure: 

1) Wrap a magnet in plastic lunch wrap and move it through the mixture of the three solids. The iron filings will stick to the magnet. The filings can be removed by unwrapping the plastic from the magnet carefully!
2) Mix the remaining salt and sand in water and stir. Make sure you have used enough water to dissolve all of the salt, but not too much that handling large quantities of salt water becomes a problem.
3) Using a funnel, flask and filter paper, filter off the sand from the salt water solution. Wash the sand with some fresh water to remove the last of the salt from the sand in the filter paper.
4) Put the sand to one side and allow it to dry in the Sun or warm oven.
5)Collect all the salt water in a weighed container and evaporate off the water. This may take some time in the Sun or may be sped up in an oven.
6)Weigh each of the separated solids and compare them with their original weights.

approve  plz!