How do you plan to solve it?
module sr_latch_nor ( input S, input R, output reg Q, output Qn ); // Write your code here assign Qn = ~Q; always@(*)begin case({S,R}) 2'b00: Q<=Q; 2'b01: Q<=1'b0; 2'b10: Q<=1'b1; 2'b11: Q<=1'b0; default: Q<=Q; endcase end endmodule