Determine the amount that would accumulate for the following investments:

1. $10,050 at 10% per annum, compounded annually for six years.

2. $650 at 12% per annum, compounded quarterly for 10 years.

3. $5,000 at 16% per annum, compounded annually for four years, and then reinvested at 16% per annum, compounded semiannually for four more years.

4. $1,000 at 8% per annum, compounded semiannually for five years, an additional $1,000 added and then the entire amount reinvested at 12% per annum, compounded quarterly for three more years.