(a) Use the given claim to state the null and alternate hypotheses.

(b) State whether the hypothesis test is left-tailed, right-tailed or two-tailed.

1. The average marathon runner weighs less than 141 pounds.

2. The variance of the radius of a certain type of nail is greater than or equal to 1.3 mm.

3. The probability that a student is accepted to Yale University is not 21%.