Distribution Theory — checking statements on chi-square, t and F

Consider the following statements: 1. Correlation coefficient is a measure of proportion or percentage in a relationship. 2. Statistic $Z^2$ is an equivalent measure of the statistic $\chi^2$. 3. t-distribution becomes mesokurtic when degrees of freedom approach a very large value. 4. $(1-\alpha)$ significant points of $F(n_2,n_1)$ distribution are same as reciprocal of $(1-\alpha)$ significant points of $F(n_1,n_2)$ distribution. Which of the above statements are correct?