Hey I am doing some exam questions from a mechanics textbook and I am really confused I was just wondering if anyone could help me out The question is:

A particle moves with uniform acceleration 1/2ms ina horizontal line ABC. The speed of the particle at C is 80ms and the times taken form A to B and from B to C are 40s and 30s.

What is the speed of the particle at A?

What is the distance of BC?