Refer to the data below and answer the questions that follow.
A, B and C participate in a triathlon. The triathlon consists of three parts. The first part consists of running, the second part cycling and the third part swimming. A can cycle thrice as fast as he can run and swim one-third as fast as he can run. B can cycle four times as fast as he can run and swim one-fourth as fast as he can run. C can swim half as fast as he can run and cycle four times as fast he can run. A can run 10 per cent faster than B and 20% faster than C. The ratio of the length of the running track to that of the cycling is 1/2 and to that of swimming tracks is 2.
Who is leading after the 2nd part is over?