Fill in the table with the register values that are given in the code piece given below. reg [3:0] a, b, c, d, e, f; reg clk; initial begin c = 2; d = 3; e = 5; #1 clk=1; #2 clk=0; #3 clk=1; end always @ (b) fork #2 e= a-1; #2 f= c+b; join always @ (a,b) begin #3 c= a-1; #1 d= c+b; end always @ (negedge clk) begin #1 c