Part E Find the three lowest normal mode frequencies f1 , f2, and f3 . Express the frequencies in terms of L , v , and any constants. List them in increasing order, separated by commas. Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value type Activate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type