Discharging

Q: Is it necessary for one to give the actual wheat or barley as sadaqatul fitr or can one give the value of the wheat or barley as sadaqatul fitr?

Q: Is it permissible to give a poor person so much of sadaqatul fitr that reaches the nisaab amount (nisaab of zakaat)?

Q: Is it permissible for several people to give their sadaqatul fitr to one poor person? 

Q: Is it permissible for one to divide his sadaqatul fitr between two or more poor people?