Given the following information Period Year Sales (yt 156 2019 217 182 185 2019-period 1 2019-period 2 2019-period 3 2020-period 1 2020-period 2 2020-period 3 2021-period 1 2021-period 2 2021-period 3 2020 141 248 144 2021 127 231 Find the seasonal index (SI) for period 2 (Round your answer to 2 decimal places)