Two students were asked to use estimation strategies to find a reasonable solution to this question: A bicyclist was on a 4 day tour. On the first day, he rode 14 miles. On the second day, he rode 41 miles. On the third day, he rode 78 miles. And on the fourth day, he rode 121 miles. Estimate how many miles he rode in total. From the choices below, select the student with a more reasonable solution.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.