What are the $5$ categories of linear programming models?

a$.$

Resource$-$allocation problems, Cost$-$benefit$-$trade$-$off problems, Mixed problems, Transportation problems, Assignment problems

b$.$

Resource$-$allocation problems, Cost$-$benefit$-$trade$-$off problems, Mixed problems, Transportation problems, Maximum$-$Flow problems

c$.$

Resource$-$allocation problems, Cost$-$benefit$-$trade$-$off problems, Mixed problems, Shortest$-$Path problems, Assignment problems

d$.$

Resource$-$allocation problems, Cost$-$benefit$-$trade$-$off problems, Network Optimization problems, Transportation problems, Assignment problems

e$.$

Integer Programming problems, Cost$-$benefit$-$trade$-$off problems, Mixed problems, Transportation problems, Assignment problems