computer architecture binary question.

please provide steps please?

3 - [8 points] Write the following sequence of code into RISC-V assembler. Assume that x,y, and z are stored in registers 18,x19, and x20 respectively. x=y+2z=xz2 4 - [5 points] The following 32-bit binary word written in hexadecimal format represents a single RISC-V assembly instruction. What is the RISC-V instruction format and specific assembly language instruction? 000620113 5 - [5 points] What is the binary encoding of the following RISC-V assembly instruction? Please write your answer as an 8-digit hexadecimal number