Can you please explain the following things..With few examples???

1.Effects of Accrued Expenses in Cash Flow Statement
2.Goodwill Impairment means?? and effects on 3 statements
3.Deffered tax Asset/Liability....a bit more detailed
4.Accumulated other comprehensive Income
5.Available for sale securities/Held to maturity securities
6.Dilutive securities and their meanings?
7.In WACCModel ,risk premium,Market Rate Rm meaning/mode of calculation