a. If x 2 1 represents the larger of two sample variances, can the F test statistic

Question:

a. If x²₁ represents the larger of two sample variances, can the F test statistic ever be less than 1?
b. Can the F test statistic ever be a negative number?
c. If testing the claim that σ²₁ ≠ σ²₁ , what do we know about the two samples if the test statistic F is very close to 1?
d. Is the F distribution symmetric, skewed left, or skewed right?