Writing assignment accounting

1.  What are the valuation guideline as to how trading and available-for-sale securities are reported on the balance sheet?

2.  Where are unrealized gains and losses for trading and available-for-sale securities reported in the financial statements?

3.  Peggy is confused as to what constitutes a current liability.  What are the two features that make a liability "current"? 

Adriana is studying for the next accounting examination.  She asks your help on two questions:

1.  What is depreciation and salvage value?

2.  How is salvage value used in determining the depreciable cost under the straight-line method of depreciation