What is the clock cycle time if the only types of instructions we need to support are ALU instructions (ADD, AND, etc.)?

In this exercise we examine how latencies of individual components of the datapath affect the clock cycle time of the entire datapath, and how these components are utilized by instructions. For problems in this exercise, assume the following latencies for logic blocks in the datapath:

1-Mem Add 200ps b. 750ps a. Regs D-Mem Sign-Extend Shift-Left-2 90ps 250ps 15ps 10ps 250ps 300ps 500ps 100ps 5ps Mux 70ps 20ps 90ps 200ps 50ps ALU