What are the minimum, first quartile , median, third quartile , and maximum of the data set 20,70,13,15,23,17,40,51

First put the data in order from least to greatest.
13, 15, 17,20] [23, 40, 51, 70
Min: 13
Q1: (middle of the lower half) (15 + 17)/2 = 16
Median: )middle of the data set) (20+23)/2=21.5
Q3:(middle of the upper half) (40+51)/2= 45.5
Max: 70

Sin(a)+cos(a)+cot(a)-1=2(csc(x)+1)