The student council wants to conduct a survey during the first five minutes of an assembly. There are 800 students at the assembly. A map of the auditorium is shown below. Note that the students are seated by grade level and the seats are numbered from 1 to 800. Describe how you would use your calculator to select 80 students to complete the survey with each of the following methods:

a) Simple Random Sample

b) Stratified Random Sample

c) Cluster Random Sample

d) Systematic Random Sample