i dont understand it

Consider a family with 4 children. Assume the probability that one child is a boy is 0.5 and the probability that one child is a girl Is also 0.5, and that the events "boy" and "girl" are Independent. (a) List the equally likely events for the gender of the 4 children, from oldest to youngest. (Let M represent a boy (male) and F represent a girl (female). Select all that apply.) O FFMF O MFFF O MMMF MMFF D FMFF MFMF O MFMM OMMFM FMMF FMFM O FFFM FFMM O MMMM O FFFF OFMMM MFFM X