Hello, Could you tell me help with two questions, please The question reads as follows: 1) Magnetic methods: According magnetic values matic susceptibility minerals can be classified into three basic groups that have their names. Bring designation of these groups and their most basic characteristic. Do that holding (s) groups fall Mi- Neral containing iron? corroborate concretely 2) Gravimetry. The density of rocks and soil depends on the density of minerals, which constitute them further porosity, and, finally, the proportion of pores filled with air and aqueous solutions. reports fol- ing rocks in a series from lowest to highest density: sandstone - basalt - quartz sand - Granite - amphibolite with 30% magnetite - Clay Thank you very much for your help..