How do I do this ? i. Find the equi-tailed 95% probability interval, i.e. nd a _ 0 such that P(Z (a,a)) = 0.95

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  How do I do this ? i. Find the equi-tailed 95% probability interval, i.e. find a _ 0 such that P(Z ∈ (−a,a)) = 0.95 and express your result in terms of the inverse function Φ−1 of the standard normal cdf Φ (note that the inverse function satisfies Φ−1(Φ(x)) = x for all x ∈R). Finally write down the value of a to three significant digits.