$1.$ If you have access to a compiler that provides optional dynamic semantic checks for out$-$of$-$bounds array subscripts, use of an inappropriate record variant, and$/$or dangling or uninitialized pointers, experiment with the cost of these checks. How much do they add to the execution time of programs that make a significant number of checked accesses? Experiment with different levels of optimization $($code improvement$)$ to see what effect each has on the overhead of checks.

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