Question 1 (30 points]: Justify the boolean equalities below, using the method specified in each part: a. [10 points] x1 + x2 * x3 =(x1 + x2).(x1 + x3) using truth tables b. [10 points] (x1 + x2 + x3)(x1 + x2 + x3) = x1 + x2 using Venn diagrams b. [10 points] (X X X3)= x1 + x2 + x3 using timing diagrams