Refer to the monthly sales data listed below and also available in Table 2. Use a multiplicative decomposition model with trend and seasonality to the estimate the sales data. What is the seasonal index for February?

Date Sales 1992-1 3888 1992-2 4390 1992-3 3951 1992-4 3798 1992-5 346 1992-6 3875 1992-7 3793 1992-8 3755 1992-9 3334 1992-10 3154 1992-11 3180 1992-12 3209 1993-1 435 1993-2 4669 1993-3 3528 1993-4 3990 1993-5 3677 1993-6 4066 1993-7 3993 1993-8 3807 1993-9 3848 1993-10 3736 1993-11 3519 1993-12 3380 1994-1 4421 1994-2 4580 1994-3 4044 1994-4 4051 1994-5 4202 1994-6 4092 1994-7 3814 1994-8 4332 1994-9 4507 1994-10 4031 1994-11 4040 1994-12 3654