Critically evaluate the research design in the attached case $(\text{'}$Marketing Analysts and Promotional Specialists Inc.$\text{'})$ with respect to internal and external validity. Recommend a better design REAL$-$LIFE RESEARCH $8\mathrm{.}1$ Market Analysts and Promotional Specialists, Incorporated Market Analysts and Promotional Specialiscs, Incorporated $($MAP$.$S$.)$ is a marketing consulting firm that specialaus in the development of promotional campaigns. The firm w formed $5$ years ago by two young marketing graduate students, Duvid Roch and Lisa Ryan, who soon overcame their initial lack of experience and have since be$-$ come known for their innovativeness and creativity.