can you get a description of the leaves?? length, width, color, whether they are frond-like or more like a plant
leaf. also, what kind of stalk does it have?
a pic would really be the best, if it's possible.
how long has she had it? how often has she been watering it?
for the size of it, it might need a bigger pot. can she see any roots coming out of the bottom drain holes?
the yellowing leaves, are they at the bottom? it might just be a normal growth pattern - especially if there is new growth at the top. or it could be a matter of not enough water - especially since there are some with browning tips.
browning tips can also be caused by not letting the water sit overnight before putting it in the pot (chlorine). if they're really unsightly, she can trim them off...just tell her to cut so that she maintains the shape of the leaf.