Question 1
Find the area between .-88 standard deviations below the mean and 2.35 standard deviations above the mean. '88=.3106 and 2.3=.4906 Both figures are added .3106+.4906= .8012 which is 80.12%
Question 2
The area between .58 standard deviations above the mean and 1.94 standard deviations above the mean .58=.2190 and 1.94=.4738. Here they minus .4738-.2190=.2548 which is 25.48%