3. During the first week of March 2021, Alex produces 300 units of a particular product. The standard time to produce one of such unit is 10 minutes and standard rate per hour is $5. The company runs 5 days a week and 8 hours a day (40 hours a week). Calculate the weekly earnings of Alex under each of the following methods: a) Halsey Premium Plan (I mark) b) Rowan Premium Plan and (I mark) c) 100% Bonus Plan (1 mark) d) Halsey-Weir Plan (I mark) e) Out of these four plans, which one will be more preferable to Alex and Why? (I mark)