Waltham Mrs. Alba L. Cardona, of Waltham, died Sunday, April 29, 2007 at her home. She was 44. Born in Guatemala, Alba had been a Waltham resident for the past eleven years, and had worked for Direct Billing Associates in Waltham. She leaves her husband, Christopher C. Foster; her daughter, Mary Cardona Foster of Waltham; her mother, Clara Luz Barrera of Guatemala; three brothers, Francisco Cardona of Watertown, Manuel Cardona of Waltham and Edin Cardona of Allston; four sisters, Alicia, Isabel, Milvia and Lety Cardona, all of Guatemala; her mother-in-law, Mary (Cassidy) Foster of Charlestown; her sister and brothers-in-law, Patricia Austin and her husband, John, of Winooski, Vermont and Robert Foster of Charlestown and many nieces and nephews. She was also a daughter of the late Manuel Cardona and a sister of the late Angel Cardona. Relatives and friends are invited to attend the Funeral at 8:45 a.m. Wednesday from The Joyce Funeral Home, 245 Main Street (Rte. 20), Waltham followed by a Funeral Mass in Saint Charles Borromeo Church, 51 Hall Street, Waltham at 10 a.m. Burial will be in Saint Josephs Cemetery, West Roxbury. Visiting hours are omitted. Memorial donations may be made to Good Samaritan Hospice, 310 Allston Street, Brighton, MA 02135.