The Texas Department of Transportation (TxDOT) is considering two designs for crash barriers along a reconstructed portion of 1-10. Design 28 will cost $3 million to Install and $144,000 per year to maintain. Design 4R will cost $3.7 million to install and $55,000 per year to maintain. Determine which design should be selected based on a rate of return analysis if TxDOT uses a MARR of 6% per year and a 20-year project period. The rate of return is 9%. Design (Click to select) ~ is selected. (Click to select) 4R