I do not know how to make the 'function'

Problem 1 Write a function file that calculates y(x) = sin(2 (4x2 + 3 ). Plot it using fplot, x goes from -8 to 8. Use your function to print out the value of y for x - -1.25 and x 1.25. Deliverables: 1. Calling script+ 2. Function file for the equation 3. Plot 4. Command window output Step by Step Instructions-+ . Follow the guidelines above in Getting Started to make your function script . Test it first by calling it from the command window with a 1.25 and 0 . Write the script to call the function .Call fplot-remember to use @fcName and to give it the start and stop values + o fplot will default to a blue line; that's fine . Make sure you fill out all four boxes below+ Self-check: - A functlon 250 200 150 100 50 -50 100 -150 200 250