please solve in clear format. Thanks

Q3) A bus company determines that the distance traveled per bus per year (X) Is normally distributed, with a mean of 100 (thousand) km and a standard deviation of 20 (thousand) km. "] What proportion of trucks can be expected to travel between 68 and 100 thousand km in a year? bj What percentage of trucks can be expected to travel elther below 60 or above 120 thousand km in a year? c] How many km's will be traveled by at most 70% of the trucks? (P(X)-0.70)