Используя язык программирования r assignment part a

Используя язык программирования R
Assignment Part A
Using the Salaries data set:
1. What are the basic mean salaries by discipline and rank conditioned on sex?
2. Show graphically these differences
3. Is this enough evidence to conclude Males earn more than women? Why?
Assignment part B (hints to the solution are attached)
Access the Salaries data set:
library(car) # install.packages("car") if needed
data(Salaries)
1. Visualize salary. Should it be transformed? If so, how? And if so, do that and include as a new variable.
2. Fit a linear model for salary as a response of sex, rank, discipline, and years since PhD. Which effects are statistically significant?
3. Plot the coefficients for those effects.
4. Discuss the results: Parameters, coefficients and model fit.