... Internal nets wire s1, c1, c2; // Instantiate logic gate primitives xor (s1, a, b); and (c1, a, b); xor #(d_sum) (sum, s1, c_in); //delay on output sum is d_sum and (c2, s1, c_in); or ... b & c_in for the time between 15 and 35 units. 3:A 1- bit full adder FA is defined with gates and with delay parameters as shown below. // Define a 1- bit full adder module fulladd(sum, ... Exercises 1: Using assign and deassign statements, design a positive edge-triggered D-flipflop with asynchronous clear (q=0) and preset (q =1) . 2:Using primitive gates, design a 1- bit full...