A Student Has Completed 20 Courses in the School of Arts

Essay

A student has completed 20 courses in the School of Arts and Sciences. Her grades in the 20 courses are shown below.
$$\begin{array} { l l l l } \mathrm { A } & \mathrm { B } & \mathrm { A } & \mathrm { B }& \mathrm { C } \\\mathrm { C } & \mathrm { C } & \mathrm { B } & \mathrm { B } & \mathrm { B } \\\mathrm { B } & \mathrm { A } & \mathrm { B } & \mathrm { B } & \mathrm { B } \\\mathrm { C } & \mathrm { B } & \mathrm { C } & \mathrm { B }& \mathrm { A } \end{array}$$
a. Develop a frequency distribution and a bar chart for her grades.
b. Develop a relative frequency distribution for her grades and construct a pie chart.