Final answer:
Additional data is required to accurately calculate the weighted average duration of the FI's assets, as it involves summing the products of each asset's duration and its weight within the portfolio.
Step-by-step explanation:
The question appears to involve the concept of weighted average duration, commonly used in finance to assess portfolio or asset management. However, without additional information such as the duration of individual assets and their respective weights within the Financial Institution's (FI) portfolio, it's not possible to calculate the weighted average duration. The weighted average duration would typically be calculated by summing the products of the duration of each asset and its proportion of the total portfolio value.