Help please

Have you ever seen a study about the effects of texting on students' writing skills? To study this further, what are some issues you would have to consider? a. Describe an observational design to study this issue. Be sure to include the population of interest, your sample selection technique, and what variables will be measured b. Describe an experimental design to study this issue. Be sure to include the population of interest, your sample selection technique, and what variables will be measured. C. What is a key difference and what can be recorded for each design type