Television viewing was found to have a mean daily viewing

time of $8\mathrm{.}35$ hours in U$.$S$.$ per household with a standard

deviation of $2\mathrm{.}5$ hours.

$($a$)$ What is the probability that the household views television

between $5$ and $10$ hours a day?

$($b$)$How many hours of television viewing must a household

have to be in the top $3\%$ pf all television viewing

households?

$($c$)$ What is the probability that a household views television

more than $3$ hours a day?