based on information, write the most appropriate method for mining the orebody.

also, state the reason for choosing such method.

Please answer all he parts.

a) A massive porphyry style deposit located at high altitude in West Papua. Average grade of the deposit is 0.5 g/t Au and 0.8% Cu. The deposit has a UCS of 200MPa and is highly fractured; country rock is similar in nature. The deposit has a large foot print area 500m by 500m and is located 300m from surface and open at depth. b) A coal seam 5 m thick, located 300m underground. Dip is horizontal. The mining lease is located in rural area. The coal is underlain by a reasonably competent mudstone and overlain by a series of typical coal measures strata. c) A tabular steep set of 5 lead zinc deposits with a constant width of 20 m. Dip is almost constant at 55. Average separation of the deposits is 10m Mean depth is 500m from surface and the grade is constant at 5% Ni. Both ore and country rock are of moderate strength, UCS 130 MPa, with little fracturing