$8)$ Suppose a bank with $$500$ million in assets has an average asset duration of $3$ years, and an average liability duration of $1$ year. The bank also has a total debt ratio of $90\%.$ R may be thought of as the required return on equity or perhaps as the average interest rate level. If R is $12\%$ and the bank is expecting a $50$ basis point increase in interest rates within next $3$ months, by How much will the equity value change?