Change the following sentence into negative sentence:
Shane Carruth's science-fiction thriller Primer is too convoluted to understand even for a Physics graduate.
1
Shane Carruth's science-fiction thriller Primer is not too convoluted to understand even for a Physics graduate
2
Shane Carruth's science-fiction thriller Primer is not very easy to understand even for a Physics graduate
3
Shane Carruth's science-fiction thriller Primer is so convoluted that it can't be understood by even a Physics graduate
4
Shane Carruth's science-fiction thriller Primer is too convoluted that it can't be understood by even a Physics graduate