10-11 GPA: 3.6, Current SAT: 1040 (Took November and soon will take December) Major: Computer Science and Engineering In state
2018 Freshman admit rates for UC GPA of 3.40-3.79 capped weighted and not major specific for UC Merced is 82%.
2019 UC capped weighted GPA averages along with 25th-75th percentile range: UCM: 3.73 (3.45-4.00)
25th-75th percentile for SAT: UCM: 1020-1290
Your GPA and test scores are below the 50th percentile and for a competitive major such as CS/Engineering it will not be an easy admit but definitely worth a try.
You want stats at or above the 50th percentile for the best chances. Make sure you list an alternate major.
What is your SAT Math score? Did you take a Math 2 SAT subject test?
What is your HS course rigor and what is the highest level of Math you will reach at end of Senior year?
Apply widely and best of luck.