Booking Holdings Inc. $($BKNG$)$ is a leading provider of online travel reservation services, including brand names Priceline, KAYAK, and OpenTable. Selected cash flow information from the statement of cash flows for three recent years is as follows $($in millions$)$:

Line Item Description Year $3$ Year $2$ Year $1$

Net cash provided by operating activities $$2,820$ $$85$ $$4,865$

Net cash provided by $($used for$)$ investing activities $(998)2,6377,050$

Net cash provided by $($used for$)$ financing activities $(1,239)1,528(8,220)$

Cash used to purchase property, plant, and equipment $(304)(286)(368)$

Repurchase common stock $(163)(1,303)(8,187)$

a$.$ Determine the net change in cash for each year. Enter answers in millions.

Year $3$: fill in the blank $1$ of $3$$

Year $2$: fill in the blank $2$ of $3$$

Year $1$: fill in the blank $3$ of $3$$

b$.$ Determine the free cash flow for each year. Enter answers in millions. For those boxes in which you must enter subtracted or negative numbers use a minus sign.

Year $3$: fill in the blank $1$ of $3$$

Year $2$: fill in the blank $2$ of $3$$

Year $1$: fill in the blank $3$ of $3$$