Identify the pattern for the following sequence. Find the next three terms in the sequence.-1, 3, -9, 27, ____, ____, ____,...a.Multiply by 3; 81, 243, 729b.Multiply by -3; -81, 243, -729c.Multiply by -3; 81, 243, 729d.Multiply by 3; -81, -243, -729