Can you me with questions 1 and 2? i need to find the area of the shaded region. and show me how to do it.

 1.find the difference between the areas of the bigger shape and the shape within.
The bigger shape is a square and shape within circle so equation is
l²-(1/4πd²) where l is length of one side of the square,π is 22/7 and d is diameter of the circle
(8ft*8ft)-(1/4*22/7*8ft*8ft) 
64ft²-352/7ft²
13.71 ft² is the area of the shaded area
2.(1/2bh)-(lw) where l is the length of the rectangle, w is the width of the rectangle,b is the base of the triangle, h is the height of the triangle.
(1/2*6m*7m)-(4m*2m)
21m²-8m²
13m² is the area of shaded area.

The correct answer is 7