a C с b b b a С b b b С a b b с C C а a) Determine whether or not i) S is closed under * ii) * is commutative b) Determine the identity element for the operation * c) Determine the inverse (under *) of each element of S.

Afarm is to be built in the shape of quadrilateral abcd, as shown below. all four sides are equal. a rhombus abcd is shown with diagonal ac equal to 15.5 feet and diagonal bd equal to 13.2 feet. what is the area of the farm? pleas only pick from the 4 below 62 square feet 52.8 square feet 57.4 square feet 102.3 square feet