urgent help

As showing the following figure, there are four mobile nods (A,B,C, and D), and two aceess points (E, and F) E and F are connected through WiFi. According to the frame structures of IEEE 802.11, What device's MAC address should be in the address fields, and what value should be set in the bit of "To DS" and the bit of "From DS", when the mobile node C sends a packet to the mobile node D? (24) (The answers should contain the packet from C to F,F to E,E to A and from A to D