I need some that knows Math of Finance

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I have four problems that is giving a very hard time to solve and i need answers, someone please help! The questions are: 1) Jack makes a regular deposits of $500.00 at the end of each half-year for 5 years and then $800.00 for the next 3 years. Find the accumulated value of his deposits. find the accumulated value of his deposits if interest is at j2=11%. 2) Find the discounted values of the following ordinary annuities: (a) $500.00 a month for 4 years 3 months at j12=10%; (b) $800.00 per quarter for 6 years 3 months at j4=14 1/4% (c) $1000.00 per half-year for 10 years at j2=12.23%. 3) Deposits of $500.00 are made at the beginning of each half-year into an account paying j2=6%. How much is in the account (a) at the end of 5 years? (b) Just before the 6th deposits? 4) Find the amount of the annuity due rounded to the nearest cent.Amount of each deposit is $9600, deposited rate annually is 5%, and the time(years) is 8 please help I would appreciate if anyone can show the steps.