Question: Prove or disprove with justification: a ) For all integers a , b , c , if a | b and b | c ,

Prove or disprove with justification:
a) For all integers a,b,c, if a|b and b|c, then a|c.
b) For all integers a,b, if a|b and b|a, then a=b.
c) For all integers a, b, c, d, if a | b and c | d, then (ac)|(b+d).
d) For all integers a, b, c, if a |bc, then a|b or a|c.
Prove or disprove with justification: a ) For all

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