Please help with A and B **Bifocal Lenses Calculation Example**A man who can produce sharp images on his retina only for objects that lie from 100 cm to 230 cm from his eyes needs bifocal lenses.**Part A:**Determine the desired focal length of the upper half of the glasses used to see distant objects. Express your answer with the appropriate units.- Equation Input Box: - \( f_1 = \) [Value] [Units] - Buttons: - Submit - Request Answer**Part B:**Determine the focal length of the lower half used to read a paper held 25 cm from his eyes. Express your answer with the appropriate units.- Equation Input Box: - \( f_2 = \) [Value] [Units] - Buttons: - Submit - Request AnswerThis example demonstrates the calculations needed to determine the appropriate focal lengths for bifocal lenses designed for both distance vision and reading.

Part A Determine the desired focal length of the upper half of the glasses used to see distant objects. Express your answer with the appropriate units. f Submit ▾ Part B Templates Symbols Undo redo Pesat keyboard shortcuts Help P Value 12 Request Answer Determine the focal length of the lower half used to read a paper held 25 cm from his eyes. Express your answer with the appropriate units. Templates Symbols Undo rego Pesat keyboard shortcuts Help Units Units Value

Part A Determine the desired focal length of the upper half of the glasses used to see distant objects. Express your answer with the appropriate units. f Submit ▾ Part B Templates Symbols Undo redo Pesat keyboard shortcuts Help P Value 12 Request Answer Determine the focal length of the lower half used to read a paper held 25 cm from his eyes. Express your answer with the appropriate units. Templates Symbols Undo rego Pesat keyboard shortcuts Help Units Units Value