Draw the third view and the points on each view. In the first picture you have what the exercise has given us and in the second what I have drawn. I have turned the page so that the first view is the one on the left, the horizontal one is the one on the right. Is that OK? Should I use the one at the right as a lateral view?
When drawing orthographic projections, it is convention to draw the "front" view in the middle of all the other views;
The "top" view is drawn above the front view,
the "left side" view is drawn to the left of the front view,
the "bottom" view is drawn below the front view, and
the "right side" view is drawn to the right of the front view.
If a "back side" view is desired, it is drawn either left of the "left side" view or right of the "right side" view.
Diagonal areas of the page are used for isometric projections or renderings of the object in question.
Take the example below.
While all the views described above can be put onto a drawing to represent the object on each side. With the use of both object lines and hidden lines, the whole object can be defined using exactly three of the views described above: one drawing for each dimension of space. Typically, the front and top view are drawn in conjunction with either the left or right side view.
Addressing your problem specifically: The problem you have been given seems to be a bit ambiguous as to which view is considered the front view and which view is considered the side view for this object. Based on your drawing, it seems you chose the left hand drawing to be the front view, and the right hand drawing to be the right side view. If you have been given no other instructions, this choice should have been fine; it was left for you to decide. However, those two drawings seem to be arranged on the page incorrectly. The left hand drawing seems to be the right side view of the right hand drawing but was placed on the left hand side for some reason (use the subtracted cylinder and different height "shelves" to verify this observation for yourself.) Because of this, I think the problem you have been given is poorly designed.
If we work off the assumption that the left hand drawing is the front view, then the 3rd view you have drawn should be the top view. However, based on the way you have drawn your object lines and hidden lines, it looks to me like you drew a bottom view. (You are trying to communicate all the geometry above the base with hidden lines.) If you did want to draw a bottom view, that view should be on the opposite side of the front view. Otherwise, you should redraw that top view, keeping in mind what object lines are visible, and which object lines are hidden.
Edit: joojaa has enlightened me to the existence of the ISO 1st angle projection. OP, you seem to be drawing your views fine so long as you intended to use ISO 1st angle projection.