Of the following statements for natural numbers, a, b and cI.If a is divisible by b and b is divisible by c, then a must be divisible by c.II.If a is a factor of both b and c, then must a must be a factor of b + cIII. If a is a factor of both b and c, then a must be a factor of b c, the true ones are

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Of the following statements for natural numbers, a, b and c<br>I.If a is divisible by b and b is divisible by c, then a must be divisible by c.<br>II.If a is a factor of both b and c, then must a must be a factor of b + c<br>III. If a is a factor of both b and c, then a must be a factor of b c, the true ones are