Lisa knit a total of 35 centimeters of scarf over 5 nights. how many nights will lisa have to spend knitting in order to knit a total of 98 centimeters of scarf. this is a unit rate word problem question

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image