Specify the register transfer operations using RTL for the following digital system operations: a) Add the contents of registers 12 and 14 and place the result in register 15. b) Logically OR the contents of register 11 with Ox0008 and place the result in register 11. c) Perform a memory read using contents of R26 as the address and place the result in R10 d) Perform a memory write using contents of register R25 as the address and contents of register R13s the data to write.