A- Consider a portfolio that is long 30 bonds that have a 4-year interest rate delta of 228.5 and short 8 bonds that have a 4-year interest rate delta of 248.5. What is the 4-year interest rate delta of this portfolio?

B- Consider a portfolio that is long 10 index options that have a delta of 0.35, gamma of 0.044, vega of 0.028, and contract size of 1,000 index units and short 14 index options that have a delta of -0.65, gamma of 0.046, vega of 0.032, and contract size of 1,000 index units. What is the gamma of this portfolio with respect to the index?

please answer both