Desain Geometri Lereng Optimum pada Endapan Laterit Menggunakan Analisis Kestabilan Lereng 2D dan 3D di Kawasan Tambang Terbuka Nikel, Kecamatan Pomalaa, Kabupaten Kolaka, Provinsi Sulawesi Tenggara = Optimum Slope Geometry Design of Laterite Deposits Using 2D and 3D Slope Stability Analysis in Nickel Open-pit Mine Area, Pomalaa District, Kolaka Regency, Southeast Sulawesi Province