$3.$ Identify the primary cash outflows and inflows from investing activities the three$-$year period $2021-2023.$ Is the company adding assets or is the company replacing assets? Is the company only selling assets? What does this indicate about the company's strategy?

$4.$ What was Pfizer's single largest use of cash from investing activities during the three$-$year period? How does that use of cash reflect Pfizer's business strategy?

please use the fsap image attached to answer the questions.