Give a causes and effects of energy shortage. anyone? pls? ☺

Ineed the answer to question 1 , i’m desperate

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)