Compare the task of making a cake to the computation of three loop iterations on a parallel computer. Examine the cake-making process and identify instances of data-level and task-level parallelism, and provide an explanation for their occurrence.

The concept of locality of reference is a fundamental principle in computer architecture that exploits the natural tendency of programs to access data in a clustered fashion. However, with the rise of heterogeneous computing systems that combine CPUs, GPUs, and other specialized hardware, how can we effectively manage the memory hierarchy and optimize data access patterns to ensure efficient program execution in such diverse environments?

The process of making a cake may be equated as running three loop iterations simultaneously. Look for and explain instances of parallelism at the data and task levels in the cake-making loop.