Me solve and explain

if the triangle shown in the diagram is dilated by a scale factor of
1/2 what will be the perimeter of the resulting triangle?
a) 6 units
b) 9 units
c) 12 units
d) 18 units

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.