Consider the following limit order book for FinTrade stock. The last trade in the stock occurred at a price of $$80.$

$\backslash$table$[[$Limit Buy Orders,Limit Sell Orders$],[$Price$,$Shares,Price,Shares$],[$$$79\mathrm{.}75,400,$$$79\mathrm{.}80,150],[79\mathrm{.}70,700,79\mathrm{.}85,150],[79\mathrm{.}65,400,79\mathrm{.}90,300],[79\mathrm{.}60,200,79\mathrm{.}95,150],[78\mathrm{.}65,500,$Tis,$]]$

Required:

a$.$ If a market buy order for $150$ shares comes in; at what price will it be filled? $($Round your answer to $2$ decimal places.$)$

Best price

b$.$ At what price would the following market buy order be filled? $($Round your answer to $2$ decimal places.$)$

Next best price

c$.$ If you were a security dealer, would you want to increase or decrease your inventory of this stock?

Increase

Decrease