Here is a regression model. Based on the following regression model, which of the statements provided below are true? If = 50 + 25X, where = estimated sales level; X = advertising, then 1. when X = 2, the actual sales level is 100. 2. when X = 3, the estimated sales level is 125. 3. when X = 3, the estimated sales level is 175. 4. when X = 3, the actual sales level is 125. 0 1 2 3 1 and 4