The average mpg usage for a 2017 Toyota Prius for a sample of 10 tanks of gas was 45.5 with a standard deviation of 1.8. For a 2017 Ford Fusion, the average mpg usage for a sample of 10 tanks of gas was 42.0 with a standard deviation of 2.3. Assuming equal variances, at = .01, is the true mean mpg lower for the Ford Fusion? (a-1) Choose the appropriate hypotheses. I know the hypotheses below is correct.

1. H₀: _{toy ford} 0 vs. H₁: _{toy ford} > 0. Reject H₀ if t_calc > 2.552

I need help with the two below. For the life of me I can't figure them out

(a-2) Calculate the t_calc. (Round your answer to 4 decimal places.)

b) Calculate the p-value using Excel. (Round your answer to 4 decimal places.)