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 <= 0; else if((J)&(~K)) Q <= 1; else if((J)&(K)) Q <= ~Q; end endmodule