Question 1150360
z=(x-mean)/sd so first one is z< (7-5.3)/1.7 or z<1 or 0.8414 or 84.1%
second is z greater than (5-5.3)/1.7 or z>-.18 or probability 0.5714 or 57.1%
third is between z of -.18 and z of +1 with probability of 0.4128 or 41.3%