Question 4. Compare the use one of the devices, as shown in the table below, which design is the best using Internal Rate of Return (25marks] Device AB Device Bo Initial costo 245000 Initial costa 189000 Annual revenues OR/yra 515000 Annual revenues Ra O&M annual maintenance a 14500 O&M annual O&M Upgrade cost at the 8th years maintenance 1 7450 Salvage value 24500 Salvage value 18900 Useful live 16 Useful live Start with i=13% 160 O&M Ro 51100 1720102 25000