HELP ASAP WILL GIVE BRAINLIEST! Thanks

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)