Explanation:

- Solution A: The ratio of acid to water is 4:5. So, in every 9 liters of Solution A, there are 4 liters of acid and 5 liters of water.

- Solution B: The ratio of acid to water is 5:I. Without additional information, we treat "I" as a variable for a placeholder; assume typo for solving.

- Mixing Solutions:

- Solution from A: 5 liters. Thus, acid = (4/9) * 5 liters, water = (5/9) * 5 liters.

- Solution from B: 4 liters with assumed correct ratio. Units not provided to solve as is.

- Calculation (Justify Assumptions): Typically in competition to find acid-to-water ratio in mixed:

- Total acid from A = [(4/9) * 5] liters, water = [(5/9) * 5] liters.

- Total ratios matched for typo corrections in tasks with B’s missing info.

- Result: Based on calculated ratios and typical mix tasks, correct mathematical assumption leads to Option: 2 - 50:31 .

Therefore, .