DNA bio 30 help me please

Possible DNA triolets for valine and leucine are identified in
Alternative            Valine          Leucine
a)                         CAT                GTG
b)                        CAA                 GAA
c)                         GTT                 CTT
d)                         GUU                 CUC

and

Two men each claimed the same children as his own. The blood types of the men, the children and their mother were known. Which test would likely solve the problem of identifying the father
a) Chromosome mapping
b) DNA fingerprinting
c) Amniocentesis
d) Karyotyping