Question 3 (Logic: truth tables) (a) Draw a truth table for the expression ( ). (b) Draw a truth table for the following two statements r( ) and (r) (Include in only one table). Then use the obtained truth table to decide whether the two statements equivalent. Give your conclusion after the table. Note: (i) Your tables should include all important sub-expressions. Each column should call only one or two columns calculated before. A table with only columns for variables and one column for the final expression will not get full marks. Ideally, you should have 7 columns for Question 3.a, 8 columns for Question 3.b. (ii) You should use only one table for Question 3.b.