Abacus numbers

This task is about numbers on an abacus.
abacus showing 3 counters on the first, 6 on the second and 4 on the third spike This abacus shows the number 364.
 
a)
Show these numbers on each abacus.
 
  i)     The number  6 3 0  
empty abacus
  ii)    The number  7 0 5
empty abacus
  iii)   The number  1 8 2
empty abacus

b)
 
Write the numbers shown by each abacus.
 
 
i)
  __________
 
 
ii)
   __________
 
 
iii)
   __________
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