Determine how many one-to-one correspondences are possible between two sets,(m,t,z,w,v) and (1,2,3,4,5), given?

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the following conditions.
a.) If in each correspondence m must match with 1.
b.) If in each correspondence m must match with 1 and t must match with 2.
c.) If in each correspondence m, t and z must match with an odd number.
 
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