Questions:

Explain the following: $(2$ Marks$)$

a$.$ Graphs and charts.

b$.$ Computer$-$Aided Design $($CAD$).$

Draw a line with end points $(2,3)$ and $(8,7)$ using DDA algorithm. $(3$ Marks$)$

Draw a line with end points $(3,10)$ and $(13,18)$ using Bresenham's Line drawing algorithm. $(3$ Marks$)$

Write short notes and draw the basic design of Cathode Ray Tube. $(2$ Marks$)$

I just want answers without explanation.