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[ADVANCE]

[VERIFY]

[SIMPLIFY]

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[PIVOT]

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In 2015, Shandong Province established an underwater archaeology research center to promote underwater archaeology and underwater cultural heritage protection work throughout the province. The research center's stations are located in the China Jiawu War Museum on Liu Gong Island and in the Weihai City Museum. To gain a detailed understanding of the underwater conditions in the sea area surrounding Liu Gong Island before choosing a suitable time for underwater exploration and salvage, an underwater archaeologist in one of the center's activities must dive 50 meters to the seabed for archaeological work. The archaeologist's oxygen consumption consists of the following three aspects:
① The average diving speed is x meters per minute, and the oxygen consumption per minute is $\frac {1}{100}x^{2}$ liters;
② The working time at the seabed ranges from a minimum of 10 minutes to a maximum of 20 minutes, with an oxygen consumption of 0.4 liters per minute;
③ When returning to the surface, the average speed is $\frac {1}{2}x$ meters per minute, with an oxygen consumption of 0.32 liters per minute.
The archaeologist's total oxygen consumption in this archaeological activity is y liters.
(Ⅰ) If the working time at the seabed is 15 minutes, express y as a function of x;
(Ⅱ) If x ∈ [6, 12], and the working time at the seabed is 20 minutes, find the range of values for the total oxygen consumption y.

Present the answer in LaTex format: \boxed{Your answer}
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