The task is to minimize the mean absolute percentage error (MAPE) by constant C. $$MAPE = \frac{1}{N}\sum_{i=0}^N{|\frac{y_i - C}{y_i}}|$$ Given values $y_0, .., y_N$. Find the constant C at which the error function (MAPE) shows the minimum value.
Is it possible to solve this problem?