a. What are reserved word in the R environment? b. In R, how is the logical constant NA used? Give an example. Enter the R environment, and do the following exercises using R programming: 1. Perform...

a. What are reserved word in the R environment?

b. In R, how is the logical constant NA used? Give an example.

Enter the R environment, and do the following exercises using R programming:

1. Perform the following elementary arithmetic exercises:

2. Body mass index (BMI) is calculated from your weight in kilograms and your height in meters: