Which of the following ray diagrams is correct for the ray of light incident on a lens shown in the figure?

$(i)$ Under what condition does a concave mirror produce a virtual and magnified image? Draw a labelled ray diagram to show the formation of the image in the above case. Also,state the position of the object to produce a magnified and real image.
$(ii)$ $A$ ray of light moving along the principal axis is falling on a concave mirror. Draw the path of the reflected ray. Also,state the values of the angle of incidence and reflection in this case.

What is the speed of light waves in a vacuum in units of $km/s$?

What is meant by a lateral shift?

What type of image is formed by a plane mirror?

For driving a car,what type of mirror would you prefer to see the traffic at your back?