The National Association for Law Placement estimated that 86.7% of law school graduates in 2015 found employment. An economist thinks the current employment rate for law school graduates is different from the 2015 rate. Pick the correct pair of hypotheses the economist could use to test this claim.

i. H₀: p ≠ 0.867
H_a: p = 0.867
ii. H₀: p = 0.867
H_a: p > 0.867
iii. H₀: p = 0.867
H_a: p < 0.867
iv. H₀: p = 0.867
H_a: p ≠ 0.867