Evaluate the following expressions. $(2)$

a$.4**7==\frac{74}{3}$

b$.4+\frac{7}{2}9-15\%6$

c$.\text{'}$K$\text{'}<mtext\; id="EditorElement\_941480"></mtext><mi\; id="EditorElement\_941466">K</mi><mtext\; id="EditorElement\_941457"></mtext><mi\; id="EditorElement\_941458">\text{'}</mi>$

d$.1+11-1$

e$.\text{'}5\text{'}16\text{'}$

f$.\frac{3\mathrm{.}9}{4}-68-6\mathrm{.}2**1\mathrm{.}5$

Suppose that $x,y,$ and $z$ are int variables and $x=13,y=45,$ and $z=20.$ Determine whether the following expressions evaluate to true or false. $(2,5)$

a$.$