What is the answer to this? (With work)

10-2 Practice Do people really prefer certain types of water? Student researchers Corey, Jerry. and Andrew investigated this question by having a random sample of 112 students drink small cups of tap water, puried water. natural spring water, and natural artesian water. The waters were given in a randomly determined order and the students stated their preference after drinking all of them. The subjects weren't allowed to know which type of water was in each cup until after they had made their choice. The table below shows the observed and expected counts for a test of the null hypothesis that the proportion of students who prefer each type of water is the same for all four types of water. Dhservedcounts __ \" ____ Is there evidence at the or = .101evel that students can taste the difference between different types of water