d, e and f parts to be done

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During a tender for the issuance of Australian government bonds, the cumulative aggregate demand by bidders is the following: Yield Total cumulative aggregate demand (in AUD million face value) 1.20% 1,200 1.15% 1,050 1.10% 1.05% 1.00% 950 900 820 The Australian government is intending to sell AUD million 1,000 face value bonds using a variable discriminatory tender. The money of the issue will be paid on the Australian government account in Top Bank, an Australian commercial bank.