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 case ({J,K}) 2'b00: Q<=Q; 2'b01: Q<=1'b0; 2'b10: Q<=1'b1; 2'b11: Q<=~Q; endcase end endmodule