A manager at a casual dining restaurant noted that 15% of customers ordered soda with their meal. In an effort to increase soda sales, the restaurant begins offering free refills with every soda order for a two-week trial period. During this trial period, 17% of customers ordered soda with their meal. To test if the promotion was successful in increasing soda orders, the manager wrote the following hypotheses: H₀: p = 0.15 and Ha: p̂ = 0.17, where p̂ represents the proportion of customers who ordered soda with their meal during promotion. Are these hypotheses written correctly? Correct any mistakes as needed.