The current inside $($best$)$ quote for ABC stock is given as follows: Bid: $$20$ Ask $$20\mathrm{.}5$ Which one of the following statement is not correct? a$.$ If you place a market order to sell, it will be executed immediately at $$20$ b$.$ If you place a limit order of $$20\mathrm{.}4$ to buy, it will not be executed unless the ask price gets blow $$20\mathrm{.}4.$ c$.$ If you place a limit order of $$20.5$ to sell, it will be executed immediately