(a) Choose the correct time series plot. (i) (ii) (iii) (iv) y^= Qtr1 + Qtr2 + Qtr3 (c) Compute the quarterly forecasts for next year based on the model you developed in part (b). If required, round your answers to three decimal places. Do not round intermediate calculation. If required, round your answers to three decimal places. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank (Example: 300 ). y^= Qtr1 + Qtr2+Qtr3+ t (e) Compute the quarterly forecasts for next year based on the model you developed in part (d). Do not round your interim computations and round your final answer to three decimal places. (f) Calculate the MSE for the regression models developed in parts (b) and (d). If required, round your intermediate calculations and final answer to three decimal places. Is the model you developed in part (b) or the model you developed in part (d) more effective? The model developed in is more effective because it has the MSE