When can more magnification of a compound microscope be obtained?

The focal length of the objective lens of a compound microscope is

In a compound microscope,the intermediate image is generally .......

In order to increase the magnifying power of a compound microscope:

In a compound microscope,cross-wires are fixed at the point:

$A$ card sheet divided into squares each of size $1 \, mm^{2}$ is being viewed at a distance of $9 \, cm$ through a magnifying glass (a converging lens of focal length $10 \, cm$) held close to the eye.
$(a)$ What is the magnification produced by the lens? How much is the area of each square in the virtual image?
$(b)$ What is the angular magnification (magnifying power) of the lens?
$(c)$ Is the magnification in $(a)$ equal to the magnifying power in $(b)$? Explain.