I need a help in this question. And also can you please it how you solved it

(6 pts) suppose that ={f, g, j, l), A-(jgf, lg)and Ba(, g, a. Is jgfigllfgl an element of B? Why or why not? b. Is glgl an element of A" B2? Why or why not? c. Is fff an element of A+B*? Why or why not? d. Is jgfigfglf an element of A2B+? Why or why not? e. Is IIf an element of A B+? Why or why not