Would you explain Question A and Question B in more details and more specifically?

6.45 Depreciation expense is an duration at the rust nl'aa and war the asset's nae-fa] Ha. Ent'nias am rminlifaaftlair rarhna am. '1'!\" mm u amnma for him airings meal the [allowing variation in useful lifa namatas. Ai- Naw ballad Ltd dapruiataa it: aircra at on a straight-I'll! hash to an aat'nnata residual Tattle arm-thei- amnumic lives as Inurwa: Aircra 18 years Heddu values ma reviewed annuallyr Engina Walla Pariad to next avarhaul Sam: Air New bah-d Ltd 11115. annual nancial min, 1:. 15. The Qantas Group depreciate; its a'rcrat't l'leat as follows: . Araralt antl angina 2.5-20 yaara til-1t} Par cant residual value '- Ainraspmnpats 152D5rmrs EDparDm-'Itraaldmlvalua Same: Qantas Airways Ltd H15, Annual report, [1. 95. Required a. Conuent on the Effect of uen- Il'lffar'nlg aprnciann rates on tha prufn ofAir NEW Ireland Ltd and the Qantas Grunp. h. Canynnmnat any mark? the choice 11me hawanlll differ auras: tin mtiiaa