In the first quarter of $2017,$ a group of mutual funds had a mean return of $6\mathrm{.}3\%$ and a standard deviation of $2\mathrm{.}8\%.$ The returns were well$-$described by a Normal model. According to the Normal model

$N(6\mathrm{.}3\%,2\mathrm{.}8\%)$ determine what percentage of this group of funds you would expect to have the following returns.

a$)$ Over $6\mathrm{.}8\%?$

b$)$ Between $0\%$ and $7\mathrm{.}6\%?$

c$)$ More than $1\%?$

d$)$ Less than $0\%?$

a$)$ The expected percentage of returns that are over $6\mathrm{.}8\%$ is

$\%.$

$($Type an integer or a decimal rounded to one decimal place as needed.$)$