Let E = {a,b,c,d,e,f} be a universe of discourse. Let A = {a}, B = {b, c, d}, C = {f,a,d}. Compute the following:

I'd like to know if these answers are correct. Thanks in advance

A (union) B = {a,b,c,d}

B (intersection) C = {d}

B^c = {a,e,f}

A (triangle) C = {f,d}

C\A {f,d}