question about actuarial models

For two risky assets X and Y and a risk-free asset F, you are given: Asset Y F Current price 100 120 1000 Expected Return 10% 12% 6% Variance of Return 3% 7% Jack bought 10 units of X, 10 units of Y and 1 unit of F today. The variance of the return of Jack's portfolio is 1.45%. Kent bought 1 unit of X, 1 unit of Y and 1 unit of F today. Calculate the variance of the return of Kent' s portfolio