What is the only way to remove a password encryption on an Excel file? A) Resave the workbook as a new document or make a copy of it.
B) Open the workbook as Read Only and resave it without a password.
C) Open the workbook in Protected View and resave it without a password.
D) Enter the password to open the workbook, and delete the password created in the Encrypt with Password box.

6. write a user-defined matlab function for the following math function: r() = 4cos(4sin ) the input to the function is  (in radians) and the output is r. write the function such that  can be a vector. a) use the function to calculate r(/6) and r(5/6). b) use the function to plot (polar plot) r() for 0 ≤  ≤ 2. hint: use “ polar” and/or for “polar plot in matlab." include the title “'r(\theta)=4cos(4sin(\theta))”