How do you plan to solve it?
module jk_ff ( input CLK, input J, input K, output reg Q ); // Write your code here always @(posedge CLK) begin if (~J & ~K) Q <= Q; else if (~J & K) Q <= 1'b0; else if (J & ~K) Q <= 1'b1; else if (J&K) Q <= ~Q; end endmodule