a. This shape will have 3 points: $A$, B, and C. Connect point $B$ to point $A$ using a line segment and connect point $\mathrm{B}$ to point $\mathrm{C}$ using a ray.

Step 1 ：This problem involves a geometric shape with 3 points: A, B, and C. The task is to connect point B to point A using a line segment and connect point B to point C using a ray.

Step 2 ：Let's define the points as follows: A = [0, 0], B = [1, 1], C = [2, 0].

Step 3 ：Connect point B to point A with a line segment. This means that the line starts at point B and ends at point A.

Step 4 ：Connect point B to point C with a ray. This means that the line starts at point B and extends indefinitely in the direction of point C.

Step 5 ：The final answer is the plot generated by connecting the points as described. It visually represents the geometric problem described in the question.