Du Newmonic is interested in memory skill development between ages 5 and 25. Please tell Du Newmonic about the advantages and disadvantages of using one of the following cross-sectional, longitudinal research, or sequential designs in conducting his study. Give an example of how that type of study might work

Jessica is a friend dislodge a piece of meat from her throat. she delivers five blows on her friend’s back with her fist and then gives him five abdominal thrusts. is jessica doing the procedure correctly? 1 no, she should use the heel of her hand for the blows. 2 no, she should use the side of her hand for the blows. 3 no, she should use her elbows to deliver the blows. 4 no, she should use a tennis ball to deliver the blows.