The following sentences form a paragraph. The second and fifth sentences of the paragraph are given. The rest are numbered as P, Q, R, S, and T. These five parts are not given in their proper order. Arrange them in the correct order to make the paragraph meaningful and then answer the questions given below.

P. A team of scientists have observed for the first time the decay of one such nucleus, the xenon-124 nuclei.

2. This duration is, however, tiny compared with the time taken for physical processes such as the radioactive decay of some nuclei.

Q. The universe is almost 14 billion years old.

R. This decay then gives information for further investigations on neutrinos, the lightest of all elementary particles whose nature is still not understood fully.

5. The half-life measured thus for the xenon-124 decay process, called double electron capture, is about one trillion times longer than the age of the universe.

S. Half-life is the time over which half of the radioactive nuclei present in a sample decay.

T. It was observed using the dark matter detector XENON1T at the Gran Sasso National Laboratory of the National Institute for Nuclear Physics, Italy.