In cell H$4,$ insert a Line sparkline based on the data in the range C$4$:$4.$ Fill the range H$5$:$9$ without formatting based on the contents of cell H$4.$ Change the color of the sparklines in the range H$4$:H$9$ to Gold, Accent $6,$ Darker $25\%(10$th column, $5$th row of the Sparkline Theme Colors gallery$).$ Add markers for each month, and then change the marker color to Green, Accent $4,$ Darker $50\%(8$th column, $6$th row of the Sparkline Theme Colors gallery$).$