Enrollment in a particular class for the last four semesters has been 120, 126, 110, and 130. suppose a one-semester moving average was used to forecast enrollment (this is sometimes referred to as a naive forecast). thus, the forecast for the second semester would be 120, for the third semester it would be 126, and for the last semester it would be 110. what would the mse be for this situation? a. 42.02 b. 100.29 c. 230.67 d. 196.32 e. 78.55