I know this a repost, but I didn't get any response and I need some help

Question

Examine the reaction mechanism found below:
A + B​2​ → AB​2 (slow)
AB​2​ + C → AB​2​C (fast)
AB​2​C + C → B​2​C​2​ + A (fast)
B​2​C​2​ → D + E (fast)

a) Write all the reaction intermediates
b) Write all the species that can be considered a catalyst.
c) provide the overall equation for this process.
d) provide the rate law based on this mechanism.

(this is thermochemistry)

I tried out a and b (I don't know if they're right, please tell me if they are) and I'm also confused for c and d.

My answers:
a) reaction intermediates : AB​2​, AB​2​C, and B​2​C​2
b) catalyst : A

Answer 1

I responded to the original question below. Thanks for giving your thoughts.