If the sides lengths of AABC are a = 7, b = 10 and c = 13, then calculate each of the following 1. [ABC] = 3 2. the inradius r = 3. the circumradius R = 4. Sin(A) =( /3 3)/ /(4[ABC]) 3) (give your fraction in reduced form) (give your fraction in reduced form)