The weight $($kg$)$ of all students in a university is normally distributed with a mean of $67\mathrm{.}55$kg and a standard deviation of $2\mathrm{.}02$kg$.$

i$.$ Calculate the probability that the weight of a randomly selected student is more than $65\mathrm{.}8$kg$.$

ii$.$ Calculate the probability that the weight of a randomly selected student is between $63\mathrm{.}9$kg and $69\mathrm{.}2$kg$.$

iii. Find the minimum weight of the top $2\mathrm{.}5\%$ of the students.