I need help trying to solve this. A few terms from the given LU factorization of A are missing. Find them. [[[1,0,0],[2,1,0],[a,-5,1]],[[7,-5],[0,b],[0,0]],[[7,c],[14,-7],[-42,15]]] a = b = c =
a) 5, -8, -3
b) -8, 5, -3
c) -8, -5, 3
d) 5, -8, 3