JavaScript Language Write in HTML

function _six grade) Create a JavaScript function that meets the following requirements: Is passed a numeric grade, calculating and displaying the corresponding letter grade based on: 100 - 90 = 'A+, 89 - 85 = 'A', 84 - 80 = 'A', 79-76 = 'B+, 75 - 73 = 'B', 72 - 70 = 'B-', 69 - 66 = 'C+, 65 - 63 = 'C', 62 - 60 = 'C-?, 59 - 56 = 'D+, 55 - 53 = 'D', 52 - 50 = D-?,