In the diagram, angle QPR = 90^o, angle PSR = 90^o and PR = 5 units. Find the length of QS.

• A.5 tan 25^o sin 65^o
• B.5 cos 25^o sin 65^o
• C.5 tan 25^o cos 65^o
• D.cos 25^o cos 65^o
• E.5 cosec 25^o