Consider the following relational scheme: X1 A1 A2 X2 АЗ A4 A5 The attributes that are part of the primary key are underlined and shaded. Assume that Following functional dependencies exist: (а) X1,...

Extracted text: Consider the following relational scheme: X1 A1 A2 X2 АЗ A4 A5 The attributes that are part of the primary key are underlined and shaded. Assume that Following functional dependencies exist: (а) X1, X2 A1, A2, АЗ, А4, А5 (b) X1, » A1, A3, A4 (c) X2 + A2, and (d) A4 + A1. Does this scheme abide by 1st, 2nd, and 3rd Normal Forms? If not, please show the table(s) after each phase.