please help

A trucking company determined that the distance traveled per truck per year is normally distributed, with a moon of 30 thousand miles and a standard deviation of 11 thousand miles, Complete parts (a) through (dj below. a. What proportion of trucks can be expected to travel between 14 and 30 thousand miles in a year? The proportion of trucks that can be expected to toyvel between 14 and 30 thousand miles in a year is (Round to four decimal places as needed. )