I. The doubling time for an investment growing according to $$V(t) = V_0 e^{r*t}$$ is given by $$t = \frac{\ln(2)}{r}$$.

II. If $$r = 0.07$$, the doubling time is approximately 9.9 years.

III. The derivative of $$V(t)$$ is $$r*V_0 e^{r*t}$$, showing that the growth rate is proportional to the current account balance.

Which of the above statements are true?

TITLE: Investment Account Data: #000000