How to solve with Dijkstras algorithm

Minimum-sum descent Some positive integers are arranged in an equilateral triangle with n numbers in its base like the one shown in the figure below for n = 4. The problem is to find the smallest sum in a descent from the triangle apex to its base through a sequence of adjacent numbers (shown in the figure by the circles). Design a dynamic programming algorithm for this problem and indicate its time efficiency 2 5 4 8 6 6