Three ways to separate mixtures

With a large sieve With a magnet By evaporation

A teacher mixed different things together. Choose the best way to separate each mixture from the list above. The first one is done for you.
  
Mixture Best way to separate the mixture
a) Rocks and soil. With a large sieve.
b) Sugar and water.  
c) Flour and peanuts.  
d) Metal paper clips and plastic paper clips.  
e) Salt and water.  
f) Metal needles and sawdust.