Let the following statement: $$\text{For any } x, \text{ if} \quad x>0 \quad \text{then} \quad x^3>0.$$
Complete the sentences below, filling in A-G from the following list.

A. Real numbers are all zero.
B. For any $x$, if $x^3>0$, then $x>0$.
C. There is some $x>0$ such that $x^3 \leq 0$
D. For any $x$, if $x \geq 0$ then $x^3 \leq 0$.
E. For any $x$, if $x > 0$ then $x^3 > x$.
F. For any $x$, $x^3 > x$.
G. For any $x$, if $x^3 \leq 0$ then $x \leq 0$.

$S$ is ? true false
The converse of $S$ is (enter a letter from A-G) and that statement is ? true false .
The contrapositive of $S$ is and that statement is ? true false .
The negation of $S$ is and that statement is ? true false .