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Refer to the following table, answer the questions below:

$\backslash$table$[[$Advertiver$,$Maximum Bid,Price Poild,Quality Score,Bid'Quality,Ad Rank,Actual CPC$],[$A$,$$$4\mathrm{.}00,$$$3\mathrm{.}00,3,,,],[$B$,$$$3\mathrm{.}00,$$$200,1,,,],[$c$,$$$200,$$$1\mathrm{.}00,5,,,],[$D$,$$$1\mathrm{.}00,,8,,,]]$

a$)$ which Ad will be in the $1$ st place? $(2$ pts$)$

b$)$ what is the actual CPC for Advertiser $A($two decimals$)?(2$ pts$)$

c$)$ what will happen when the quality score of Advertiser B increases from $1$ to $3?$ discuss the changes to its Ad Rank and actual CPC$.(4$ pts$)$

d$)$ discuss the best practices for improving quality score $(4$ pts$)$

a$)$ AdD