I only need the answer to #1. Thank you!!

1 Use the returns data below for two stocks and construct a mean-varlance efficient frontler. (1) Calculate the covarlances of two pssets. (2) For each of the following welghts, compute the expected returns and standard deviation of the porttollos. (3) Plot them in a coordinate system with the y-axis as the expected return and the x-axls as standard deviations