4. Write E20 assembly instructions as described. When directed to write "a pair" of instructions, you should write two instructions that, when executed in sequence, will have the described effect. Give each solution as both E20 assembly language program and the equivalent E20 machine language representation. Give each machine language instruction as a 16-bit binary number. Write each instruc- tion on a separate line. Write all 16 digits of each number. (a) Write an E20 instruction that will jump to the address identified by label target. When translating to machine language, assume that target has address 3, and that the current program counter is 9. (b) Write an E20 instruction that will jump to the address identified by label target, if register $4 is zero, and otherwise will proceed to the next instruction. When translating to machine language, assume that target has address 3, and that the current program counter is 9. (c) Write a pair of E20 instructions that will set the value of the memory cell identified by label isless to 1 when the value of $4 is less than 10 (decimal), and to 0 otherwise. When translating to machine language, assume that isless has address 3. (d) Write a pair of E20 instructions that will move the value stored at memory cell 29 into memory cell 30.