how should a female of 40 years gain weight what foods should she eat everyday ( height...5.3, weight 52kg )

A. Actually if you look at the height and the weight it is very much in sync as women who are Hightide at 5’6” they are meant to be somewhere around 57 to 60 kg so your height and your weight is very much in sync if you gain more weight it is not going to be healthy for you