You hold an equally-weighted (half invested in each) portfolio consisting of two stocks A and B, whose returns for the past three years are given below. Year Stock A Stock B 2018 24% -2% 2019 -4% 26% 2020 10% 12% What are the average return and standard deviation of your portfolio AB? Average return is %, standard deviation is %. Round your answer to a whole number, e.g. x or xx. (Hint: Think of portfolio return each year.)