Switching major to computer science

I was admitted to my alternative major which is business economics. How hard would it be to switch from business economics to computer science? Thanks!

It helps to look at the website.
http://www.changeofmajor.uci.edu/

Computer Science and Engineering

Requirements Description
Cumulative UC GPA

2.7 overall and 2.7 quarterly GPA in the quarter immediately preceding the change of major request.
Course grades

Minimum 3.0 GPA in prerequisite courses:
Math 2A-B-D.
Physics 7C-7D, 7LC-7LD.
ICS 21-22 or CSE 31-32 or ICS 31-32 or CSE 41-42.
Other

Students admitted to the major in Computer Science and Engineering will be assigned to the Donald Bren School of Information and Computer Sciences or The Henry Samueli School of Engineering based on enrollment.
Students with more than 90 units will be reviewed on a case-by-case basis, provided they have made substantial progress in courses required for the major.

Hard to get in the pre req classes. Take ICS 31 this summer.