lab1: due 1/10/19 at 10pm
lab2: due 1/17/19 at 10pm
lab3: due 1/31/19 at 10pm
lab4: due 2/7/19 at 10pm
lab5: due 2/14/19 at 10pm
lab6: due 2/28/19 at 10pm (see zyBook for details and submission)
lab7: due 3/7/19 at 10pm
lab8: due 3/14/19 at 10pm (see zyBook for details and submission)
