Question

what is the relative age of the rocks oldest to youngest?

Explanation:

Step1: Apply law of superposition

In an undisturbed sequence of sedimentary rocks, the oldest rocks are at the bottom and the youngest are at the top. Also, intrusions are younger than the rocks they cut through. From the image, rock I is at the bottom - it is the oldest. Then comes rock B which lies above I. Rock F is above B. Rock M is an intrusion that cuts through B and F, so it is younger than B and F. Rock R is the top - most layer, so it is the youngest.

Answer:

I, B, F, M, R