1

您

nín

you (courteous, as opposed to informal 你 nǐ)

2

可以

kěyǐ

can may possible able to not bad pretty good

3

示範

shìfàn

to demonstrate to show how to do sth demonstration a model example

4

一下

yīxià

(after a verb) a bit; a little (indicating brief duration, or softening the tone, or suggesting giving sth a try) all at once; suddenly

=5

嗎

má

(coll.) what?

=5

嗎

mǎ

used in 吗啡 mǎfēi

=5

嗎

ma

(question particle for "yes-no" questions)