Help meeeee me confused i dont understand

During the past 10 years, the percent returns on two mutual funds (aggressive and passive) expressed in percentages were as follows: Year Aggressive Fund Passive Fund 10 1% 4% 9 7% 2% -8 1% 4% -7 4% 2% -6 8% 3% 5 2% 2% 9% 3% 3 2% 2% 2% 4% Last Year 6% 4% Note that this is a sample of returns. a) Compute the expected return for the two funds. Round your answers to two decimal places. Aggressive = Number Passive = Number b) Compute the variance and standard deviation of the returns of the two funds. Round your answers to two decimal places. Variance: Aggressive = Number Passive = Number Standard Deviation: Aggressive = Number Passive - Number