Braulio (correctly/ incorrectly) found the value of a because he ( A: correctly performed synthetic divison, B: made a mistake in the fourth column of his work, C: should have used -1 instead of 1, D: should have solved the equation a+14= -17) Zahra (correctly/ incorrectly) found the value of a because she (A: should have solved the equation a+18= -17, B: incorrectly applied the powers to -1, C: correctly substituted and evaluated the polynomial, D: should have substituted 1 instead of -1) (see picture)