explain how it was solved

In order to determine the robust set point of fuel consumption of a gasoline car, a set of experiments were carried out. The control factors were identified as A: Octane number, B: Tire Pressure, and C: Car speed. The car performance metric is based on the mean distance traveled per one liter of gasoline. The matrix below shows the combinations of control parameters based on the orthogonal matrix with the mean and variance values. 1- On the last column of the table, fill in the signal to noise ratios 2- Determine the robust set point