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 32% -10%
2019 -4% 26%
2020 16% 6%

What are the average return and standard deviation of your portfolio AB? The average return is %, the standard deviation is %. Round your answer to a whole number, e.g., x or xx. (Hint: Think of portfolio return each year.)