Questão de Língua Inglesa

Analyze the following statements about the text: I. In “AI could provide a better experience” (l. 08), the word “better” is the superlative form of the irregular adjective “good”. II. In “One of the world’s top 10 most stressful jobs” (l. 11), “most stressful” is a superlative structure and “most” is used because “stressful” is a long adjective. III. In “It provides faster, more efficient service” (l. 21-22) there are two comparative structures. We add -er to the short adjective “fast”, and “more” to “efficient” because it is an irregular adjective. Which ones are correct?