SubArea: Powers and roots of complex numbersLevel: BProject ID: 2010013401Source Problem: 1003109301Accepted: 0Clonable: 1Easy: 0Consider the equation \( x^4 + 16 = 0 \). Find the sum of all its roots in the set of complex numbers.\( 0 \)\( 2 \)\( -2 \)\( 16 \)\( -16 \)