Answer:
5.40; 4.86
Explanation:
arithmetic: will be the sum of rates and divide by the number of elements
5 elements:
(0.05 + 0.21 + (-0.12) + 0.07 + 0.06 ) / 5 = 0,054 = 5.4%
the geometric will be the multiplication of the rate coefficient and the calcualte the root for the number of elements.
1.05 x 1.21 x .88 x 1.07 x 1.06 = 1,26808096
now we do fifth root as there was 5 element: 1.048647187
the geometric rate will be 4.86%