A publisher of a crossword puzzle magazine wants to learn more about their customers. The publisher randomly sampled 13 customers and asked each how long does it take for them to successfully complete an average crossword puzzle. The times, in minutes, are listed next. 54 35 22 26 31 38 45 40 24 42 50 33 60 The publisher would like a 95% confidence interval estimate of the mean time, in minutes. (Round your answers to two decimal places.) lower bound