How to print the following information with a single linux command line?

How to print the following information with a single linux command line?.

How to print the following information with a single linux command line?

Print the number of lines in the text le myfile.txt that contain the string

linux.student.cs.uwaterloo.ca where each letter could be either uppercase or low-

ercase.

How to print the following information with a single linux command line?