USING RISC-V PLEASE

Find the shortest sequence of RISC-V instructions that extracts bits 16 down to 11 from register x5and uses the value of this field to replace bits 31down to 26 in register x6without changing the other bits of registers x5or x6.(Be sure to test your code using x5=0 and x6= 0xffffffffffffffff. Doing somay reveal a common oversight.)

If anyone could explain how to go about solving this, I'd really appreciate it. I want to learn this but my professor can't teach for her life.