The state of the book is:

$\backslash$table$[[,$Trader,Time,Price,Quantity,Display$],[,$Elin,$9$:$45,10\mathrm{.}20,800,$Y$],[,$Sophia,$9$:$40,10\mathrm{.}09,500,$Y$],[,$Will,$9$:$38,10\mathrm{.}09,100,$Y$],[,$Adam,$9$:$43,10\mathrm{.}05,300,$N$],[$Sell$,$Lucas,$9$:$42,10\mathrm{.}05,200,$Y$],[,,,,,],[$Buy$,$Ellen,$9$:$42,10\mathrm{.}03,400,$N$],[,$Ada,$9$:$41,10\mathrm{.}02,300,$Y$],[,$David,$9$:$43,9\mathrm{.}99,200,$Y$],[,$Renee,$9$:$44,9\mathrm{.}99,300,$N$],[,$Max,$9$:$46,9\mathrm{.}80,1000,$Y$]]$

Suppose at $9$:$46,$ Lisa submits an order, "Buy $700,$ limit $10\mathrm{.}05."$ Then

A$.$ Lisa buys $200$ from Lucas at $10\mathrm{.}05$; Lisa buys $300$ from Adam at $10\mathrm{.}05$; Now, the best bid and offer in the market are: $10\mathrm{.}02$ bid for $300($Ada$),100$ offered at $10\mathrm{.}09($Will$).$

B$.$ Lisa buys $200$ from Lucas at $10\mathrm{.}05$; Lisa buys $300$ from Adam at $10\mathrm{.}05$; Now, the best bid and offer in the market are: $10\mathrm{.}03$ bid for $400($Ellen$),100$ offered at $10\mathrm{.}09($Will$).$

C$.$ Lisa buys $200$ from Lucas at $10\mathrm{.}05$; Lisa buys $300$ from Adam at $10\mathrm{.}05$; Now, the best bid and offer in the market are: $10\mathrm{.}05$ bid for $200($Lisa$),100$ offered at $10\mathrm{.}09($Will$).$

D$.$ Lisa buys $200$ from Lucas at $10\mathrm{.}05$ ; Lisa buys $300$ from Adam at $10\mathrm{.}05$ ; Now, the best bid and offer in the market are: $10\mathrm{.}03$ bid for $200($Lisa$),400$ offered at $10\mathrm{.}09($Sophia$).$