a.

$$x=1, y=0.6$$ and $$z=0.8$$.

b.

$$x=\sqrt{5}, y=1$$ and $$z=2$$.

c.

$$x=3, y=4$$ and $$z=5$$.

d.

$$x=1, y=1$$ and $$z=0$$.

e.

$$x=13, y=12$$ and $$z=5$$.

Answer sheet:

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