Construct a bar graph for each of the following (assume the independent variable is Group and the dependent variable is time):

a. \(\operatorname{Group} \mathrm{A}(N=21, M=14.05, s=3.63)\);
Group B \((N=21, M=12.33, s=3.26)\)

b. Group \(\mathrm{A}(N=28, M=6.79, s=3.11)\);
Group B \((N=28, M=7.93, s=2.36)\)

c. Group \(\mathrm{A}(N=16, M=52.56, s=23.77)\);
Group B \((N=16, M=60.38, s=21.91)\)

d. Group \(\mathrm{A}(N=25, M=5.76, s=2.14)\);
Group B \((N=25, M=4.43, s=2.27)\)