$\backslash$table$[[15,,$Days,# of Workers,Shift,# of Workers$],[16,,$Sunday,,,$1],[17,,$Monday,,,$2],[18,,$Tuesday,,,$3],[19,,$Wednesday,,,$4],[20,,$Thursday,,,$5],[21,,$Friday,,,$6],[22,,$Saturday,,,$7],[23,,,,,],[24,$Objective,,.,,$],[25,,$Total Salary,,,$],[26,,,,,],[27,$Subject to$,,$LHS$,$RHS$,],[28,$Sun,Requirement,,,ser$],[29,$Mon,Requirement,,,$],[30,$Tues,Requirement,,,$],[31,$Wednes,Requirement,,,$],[32,$Thurs,Requirement,,,$],[33,,$y Requirement,,,$],[34,$Satur,y Requirement,,,$1876]]$

Consider AirExpress problem and the screenshot above. What type of decision variables are needed?

Integer

Continous

Binary

Random