1. It is decided to conduct the test at a significance level of 5%.

It is given that, for $X\textasciitilde{}B(30,0.5)$,

$P(X\geq19)=0.10024$

$P(X\geq20)=0.04937$

$P(X\geq21)=0.02139$

(i) Write down the critical value for this test.

(ii) Write down the actual significance level for this test.