could you please tell me ______________?sure it’s very easy

could you please tell me ______________?sure it’s very easy
( )could you please tell me ______________?
sure it’s very easy
a.where can i buy this king of camera b.who bought the camera c.if there is a camera shop over there
D.how i can use the new camera
( )i don‘t know _____;_______,I'll fly kites with my friends.
a.if it rain tomorrow ;if it rains
b.if it will rain tomorrow ;if it won't rain
c.if it will rain tomorrow ;if it doesn't
d.if it rains tomorrow ;if it will
thank you!