Question $43(1$ point$)$

What is the value of the following postfix expression? $($all digits listed are positive$)$

$732**-4$uarr$\frac{93}{+}$

$$ A

Question $44(5$ points$)$

Construct a binary search tree for the following set of numbers

$34,14,39,26,45,54,46,17,7,68$

and then find its preorder traversal.

$$ A $$ A $$ A $A$

A

A $$ A $A$

$A$

A