a.
From the graph, you can see that at year 14, the revenue from the online ad is more than 4 million dollars , while that of the printed ad is less than 2 million dollars. At this point the revenue for the online ads is more than double that of the revenue for the printed ads.
b.
Based on the graph, approximately after seven and a half year from the time the newspaper started its online version the revenue from the two ads became equal.