Which of the following sentences is correctly punctuated?

I don’t know when the vendor will visit again, and we need more supplies for the office.
I don’t know when the vendor will visit again and we need more supplies for the office.
I don’t know when the vendor will visit again and, we need more supplies for the office.

During which of the following phases of the business cycle does the real gdp fall? a. trough b. expansion c. contraction d. peak

What legislation increased the ability for federal authorities to tap telephones and wireless devices, tightened the enforcement of money laundering activities, as well as broadened powers toward acts of terrorism and acts such as drug trafficking?

Amazon inc. does not currently pay a dividend. analysts expect amazon to commence paying annual dividends in three years. the first dividend is expected to be $2 per share. dividends are expected to grow from that point at an annual rate of 4% in perpetuity. investors expect a 12% return from the stock. what should the price of the stock be today?