Why does the method remove(x) in the RedBlackTree implementationperform the assignment u:parent = w:parent? Shouldn’t this already be done by the call tosplice(w) boolean remove(T x) {Node u = findLast(x);if (u == nil || compare (u.x, x) != 0)return false;Node w = u.right;if (w == nil) {§9.2W = U;u = w.left;} else {while (w.left != nil)w = w.left;}RedBlackTreeU.X = W.X;u = W.right;splice (w);u.colour +=w.colour;u.parent = w.parent;removeFixup (u);return true;199Red-Black Trees

A Red-Black Tree is a self-balancing binary search tree where every node has a color either red or…

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Why does the method remove(x) in the RedBlackTree implementation perform the assignment u:parent = w:parent? Shouldn’t this already be done by the call to splice(w)