Dr. G. is evaluating a large government grant. The purpose of the grant is to revise how mathematics and science education courses are taught at the community college and university level. There are 20 community colleges and ten universities involved with the grant, each with one science education course. Describe how you would carry out the procedure for a 50 percent sample:

a. simple random sample.

b. stratified random sample.

c. cluster sample."

I need typed answer