Answer the following questions in reference to the excel sheet image given:

$1.$ If we could increase all conversion rates by $20\%$ how much lift would we get?

$2.$ If we could increase the number of visits by obtaining an equal number of visits from each of cpc$,$ cpm and affiliate by spending $$100,000,$ how much lift would we get?

$3.$ If we could increase the number of visits from the channel that gave the best return, and ignored the others, which channel would you choose and how much would lift would we get?

$4.$ For channels where the CR on Mobile is less than half that for desktop, if we could increase the CR for Mobile to be half the equivalent rate on desktop, how much extra revenue would we get?