Find the shortest sequence of RISC-V instructions that extracts bits 16 down to 11 from register x5 and uses the value of this field to replace bits 31 down to 26 in register x6 without changing the other bits of registers x5 or x6. (Be sure to test your code using x5 = 0 and x6 = 0xffffffffffffffff. Doing so may reveal a common oversight.)