4.25 Determine the gcd of the following pairs of polynomials.
a.x3 + x + 1 and x2 + x + 1 over GF(2)
b.x3 - x + 1 and x2 + 1 over GF(3)
c.x5 + x4 + x3 - x2 - x + 1 and x3 + x2 + x + 1 over GF(3)
d.x5 + 88x4 + 73x3 + 83x2 + 51x + 67 and x3 + 97x2 + 40x + 38 over GF(101)
 
 
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