(approximations:Numbers of significant digits in).Suppose approximations a≈a*, b≈b*,....,z≈z* are such that  i)RE(a≈a*)=0.3147872 x 10-2  ii)RE(b≈b*)=0.59815846 x 10-4 iii)RE(c≈c*)=0.431685 x 10-8 Find the numbers of significant digits in each approximations.

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