need help with 7. part a) and part b)

please and thank you

Futures 7) A portfolio manager oversees a $1 billion U.S. equity portfolio and wants to use the standard S&P 500 futures to hedge the entire portfolio. Assume the portfolio has a beta of 1.10 to the S&P 500 Index. Assume next month's S&P 500 futures contract has a current level of $3610.00. a) What is the current contract notional amount? 4 pts b) How many futures contracts does the portfolio manager need to purchase? 5 pts