Can you help me with both please and thank you

12. If you examine the number of text messages sent in your class today throughout the school year. Which of the following applies: a) this study is cross-sectional b) this study is longitudinal c) this study is latitudinal d) this study is both longitudinal and cross-sectional 13. A teacher records the amount of time students spend using their phones in class today, this is an example of a) Experimental Study b) Longitudinal Study c) Latitudinal Study d) Observation Study