md`## Task 8:
- 8-1. Create an axis on top of the chart for xScale. Assign a class named "axis" to the group element you just created at the end of the \`svg\` element. *hint* : think about whether you need to use \`d3.axisTop()\` or \`d3.axisBottom()\`.
- 8-2. Push the axis to the base of the chart using SVG *transformations*.
- 8-3. Style \`path\` and \`line\` in \`.axis\` such that they are in teal (*Hint*: using \`stroke: teal;\`). Style \`text\` such that it is Optima, sans-serif, bold, 14px, and in teal.
- 8-4. Set the rough number of ticks to be 5. // D3 might override it, though.
- 8-5. Only label 0, 100, 250, and 600, using \`tickValues([])\`.
- 8-6. Generate a Y-axis on the left. Set the rough number of ticks to be 5. Push this axis to the right by \`margin.left\` px. Also assign the class of "axis" to it.
p.145
`