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Silicon Valley Bank had a $21 billion bond portfolio; it purchased bonds with average duration of 4 years when market yield was 1.79%. a. If the coupon rate was also 1.79%, explain both the interestrisk and reinvestment-risk if yield increased to 4.7%. b. In which case their loss would be higher: if bonds had a shorter or longer maturity? Explain by comparing the results of 6-year bonds to part a. c. Discuss the interest-risk and reinvestment-risk if the rates instead decreased to 1%