The 4 Mean Smoothing technique calculates the average of the current and previous three values to smooth out any fluctuations in the data. In this case, the two values that smooth the 13th of January would be the average of the values on the 10th, 11th, 12th, and 13th. Looking at the given data set, the values for those four days are 29.25, 28.25, 29.25, and 28.25, respectively. Therefore, the two values that smooth the 13th of January are 29.25 and 28.25.