If z1z2z3=−8z_1 z_2 z_3 = -8z1z2z3=−8 and ∣z1∣=∣z2∣=∣z3∣=r|z_1| = |z_2| = |z_3| = r∣z1∣=∣z2∣=∣z3∣=r, find rrr.
111
222
83\sqrt[3]{8}38
Cannot be determined