Preciso das respostas. the modal verbs can, may, and could are...

Preciso das respostas.
the modal verbs can, may, and could are used to express different meanings. take a look at the following picture, in which a group of students are in a computer lab doing some research for a school assignment. then match each question to its appropriate meaning expressed by the modal verbs in the box below
offer
polite request
request
permission
a) can you help me with this computer?
b) can i help you with that computer?
c) could i use your computer for a moment, please?
d) may i use my phone to do some research?