If k = 2.0 and V0 = 50, what would V* have to be for the function

Question:

If k = 2.0 and V0 = 50, what would V* have to be for the function to be continuous? Graph the resulting function.
Suppose a neuron has the following response to inputs. If it receives a voltage input V greater than or equal to a threshold of V0, it outputs a voltage of kV for some constant k. If it receives an input less than the threshold value of V0, it outputs a fixed voltage V*.