If you invest $750 every six months at 8% compounded semi-annually, how much would you accumulate at the end of 10 years?

Attached are a few questions from a quiz a couple of months ago that I never received a correct answer for, these questions are leading up to a final I have in a few weeks and would appreciate any assistance.

Thanks!

1. If you invest $750 every six months at 8% compounded semi-annually, how much would you accumulate at the end of 10 years?
a. $10,065
b. $10,193
c. $22,334
d. $21,731

2. The focus of current asset management is on:
a. property, plant, and equipment acquisition.
b. cash, accounts receivable, and inventory levels.
c. investments in marketable securities.
d. both a and c.
e. all of the above.

3. With regard to the hedging principle, which of the following assets should be financed with current liabilities?
a. Minimum level of cash required for year-round operations
b. Expansion of accounts receivable to meet seasonal demands
c. Machinery used to produce a firm's inventory
d. Both a and b
e. Both b and c

4. If you place $50 in a savings account with an interest rate of 7% compounded weekly, what will the investment be worth at the end of five years (round to the nearest dollar)?
a. $72
b. $70
c. $71
d. $57

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