need help solving this

Demand history for the past three years is shown below, along with the seasonal indices for each quarter. Year Quarter Year 1 Q1 Q2 Q3 04 01 02 03 04 01 02 Q3 04 Year 2 Seasonal Index 1.2 1.228 0.851 0.735 1.2 1.228 0.851 0.735 1.2 1.228 0.851 0.735 Demand 874 844 570 467 823 845 639 524 814 850 571 546 Year 3 Do not round intermediate calculations. Round your answer to the nearest whole number. Use exponential smoothing with alpha (a) = 0.3 and an initial forecast of 697 along with seasonality to calculate the Year 4, Q1 forecast