Citoyenneté numérique et réseaux sociaux : analyse et calcul

Read the following short text and complete the tasks: 'Social media platforms have revolutionized communication. However, they raise questions about data privacy and the spread of misinformation. Statistics show that $75\%$ of teenagers spend more than $3$ hours a day on these platforms. If a student spends $t$ hours per day, the total time spent per week is $T = 7t$. Given that a student uses social media for $4.5$ hours a day, calculate the weekly total $T$ and discuss one positive and one negative impact of virtual citizenship.'