Fill in the Instruction Status portion of the scoreboard with the clock cycle that the instruction is Issued, Reads Operands, Completes Execution, or Writes Result. Start with cycle 1. The Register Result Status and Functional Unit Status portions of the scoreboard are shown for your reference, but you do not need to fill them in. This particular machine has two integer units, one FP addition unit, one FP multiply and one FP divide. For execution, LD requires 1 clock cycle, ADD requires 2 clock cycles, MUL requires 10 clock cycles, and DIV requires 20 clock cycles. PLEASE GIVE AN EXPLANATION!

Issue Read Operands Exec Complete Write Result IS Instr ADD F2, F2, F4 MUL F6, F2, F4 LD F4, (R2) DIV F12, F2, F8 Fi Fj Fk Qj Qk Rj Rk Name Busy Op Int1 FS Int2 Mult Add Divide FO F2 F4 F6 F8 F10 F12 F30 RRS FU