Write a pseudo code that that does all of the following (steps a through e).
a. Prompt the user to enter a numeric score.
b. Read the score. Note that fractional inputs (like 95.7) are possible
c. If the score entered is not valid, print an error message, do not assign a grade, and do not output a grade
d. Otherwise, assign a letter grade to a variable based on the grading criteria below
e. Output the letter grade
80 up to but less than 90 B
70 up to but less than 80 C
60 up to but less than 70 D
less than 60 F
less than 0 or greater than 100 invalid score
Include flowchart and analysis