Under which of the following conditions will there be no change in the reading frame of following mRNA? 5'AACAGCGGUGCUAUU3'

(1) Insertion of G at 5th position
(2) Deletion of G from 5th position
(3) Insertion of A and G at 4th and 5th positions respectively
(4) Deletion of GGU from 7th, 8th and 9th positions

With Explanation plz
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Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs