Answer:

Five parameters are estimatable: V_b, K, $\dot{k}_M$, g and $\dot{v}$. Functions of these parameters, such as f, $\dot{r}_B$and V_m are estimatable as well, obviously. The relationschip between V and t gives information about V_b, $V(\infty)$ and $\dot{r}_B$ (see previous question); the relationship of $V(\infty)$with X gives information about K and V_m; the relationship between $\dot{r}_B$ with $V(\infty)$ gives information about $\dot{k}_M$ and $\dot{v}$; the relationship between V_m and $\{\dot{v}, \, \dot{k}_M, \, g\}$ gives information about g. There might well be practical problems with obtaining these parameter values from the two data sets.