Multiplication rules

This task is about finding and using rules for patterns.
a) Use the multiplication rule given to fill in the boxes
 
 
 
The rule is  
 
b) Work out the multiplication rule, write it in the space given, and then use it to fill in the boxes.
 
 
i)
The rule is
ii)

 

c)

Make up a rule which uses multiplication, write it in the space given, and then use it to fill in the boxes.
 
    The rule is