Superman is standing on top of 148 ft tall building. he has 6 ft tall. he looks and sees his shadow on the ground. his shadow in the buildings shadow together is 118 ft. what is the angle of depression in degrees from the top of Superman's head to the tip of his shadow on the ground?​

Icould really use some with this question.

If you could answer these your a life saver

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?