Silitonga, P., Department of Mathematics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Kampus Baru UI, Depok, 16424, Indonesia; Bustamam, A., Department of Mathematics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Kampus Baru UI, Depok, 16424, Indonesia; Muradi, H., Department of Mathematics, Faculty of Science and Information Technology, Institut Sains dan Teknologi Nasional, Jl.Moh Kahfi II Srengseng Sawah Jagakarsa, Jakarta Selatan, 12640, Indonesia; Mangunwardoyo, W., Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Kampus Baru UI, Depok, 16424, Indonesia; Dewi, B.E., Department of Microbiology, Faculty of Medicine, Universitas Indonesia, Jl. Salemba Raya no. 5, Kota Jakarta Pusat, Daerah Khusus Ibu Kota Jakarta, 10430, Indonesia