Hey, I need help solving these. I am currently in geometry Please show your work when solving!

1. ABCD is a square with BC = 4, and the curves are semicircles. What is the area of the shaded region? D C O a 16 Ob 4n O c 16-4n O d 16-8n O e 16-16nh b 18 Solve for side "a" O a 12 Ob 20 O c 6.48 O d 20.78 Oe 10.39The figure is an example of a(n)... O a hexagon Ob heptagon OC octagon O d nonagon Oe boomagon(4x + 6) (6x - 8) (5y + 16) What are the values of the variables in parallelogram BRED? O a x = 4, y = 19 Ob x = 6, y = 19 O c x = 5, y = 27 Od x = 3, y = 32 O e x =7, y = 26