Given that $a,b,$ and $c$ are already declared

as ints, which of the following statements are

valid? NOTE: In this context, valid means it

does not cause a compilation error OR A

WARNING. Trying to store a double in an int,

for instance, causes a warning!

boolean $t=a$;

$a=b$;

$b=8\mathrm{.}7$;

$c=\frac{a}{2\mathrm{.}3}$;

$a^{**}b=12$;

$a=67$;

$c=a-b$;

$a+b=8$;