a) For a given operation, provide an example of a constraint and an example of a bottleneck using the definitions provided by the authors of our text for these two (constraint and bottleneck) terms. This should illustrate the difference between these two terms. b) You and three friends are preparing a mailing for your organization. There are four steps in the process and each one of you will perform a step and each step will be performed by only one of your group. After doing this for twenty minutes, you want to determine how many envelopes can be completed in the next hour. The steps are as follows: fold the insert which takes 15 seconds, place the insert into the envelope and seal the envelope which takes 20 seconds, place the mailing labels on the envelope which takes 30 seconds, stamp the envelope and ensure everything is correct which takes 28 seconds. How many envelopes can your group complete in one hour? c) Now suppose for the process in b), the time to complete the last step to ensure everything is correct has been improved and now it only takes 25 seconds. In addition, placing the mailing labels has now been automated and only takes 10 seconds. How many envelopes can your group complete in one hour now.