2.low severity and high priority: company logo
severiety is less,it does not affect to the software but 
the priorrity is more.

3.both are high:
arithmetical bug.

4.colour of the page.
it does not affect the s/w

*High P and low s- If a bug has great bussiness importance 
but it is not affecting the funcionality of feature. e.g. 
company name is Kavita Pvt. LTD. but wrongly written as 
Kvita Pvt. LTD. on a build. It has business importance bcoz 
its name is written wrongly. But it has low severity 
becouse the funcnality of feature is working fine.
* Low P high S- a bug which is not easily reporducible by 
end user. For e.g. If the hard disk of your computer 
crashses then Bill Gates will not come to repaire it. In 
this case severity is high but priority is low.
* High P and high S- Any bug filed under sanity testing
(sanity covers test cases which are mandatory to be passed 
or go to the next level of testing) is high P and High S.
Suppose you have to send a report through mail to your 
manager and mangaer's work is based on ur report. But you 
are not able to login your account and therefore not able 
to send mails.
*Low P and Low S- such as font size font color fond family 
etc.