PLEASE SHOW ME STEP BY STEP FOR EXCEL WORKBOOK. I dont know how to work these problems in excel, i think solver add in is suppsoed to be used. thank you!

i only added one example problem at a time as the first one was answered already and the answered stated its chegg policy to only do one at a time

2.1 Verifying Linearity: Revisit Examples 2.2,2.3, and 2.4 and verify that the properties of proportionality, additivity, and divisibility are reasonable assumptions in modeling each problem. EXAMPLE 2.3 Acme Communications Acme Communications operates a regional call center where the workday is broken down into six 4-hour shifts, and each operator works two consecutive shifts. The table below describes staff requirements on each shift. The call center's manager wishes to assign operators to the six available starting times so that the staffing requirements are covered in each period and the total workforce size is as small as possible