$($i$)(40$ points$)$ Determine the project$$s SPI, and CPI at this point $($end of day $48).($ii$)(25$ points$)$ Interpret the SPI and CPI by stating and explaining whether the project is doing better$/$worse than plan on schedule and cost. Also, forecast the actual cost $($at completion$)$ of Activity $4,$ assuming that its future expenditure $($past day $48)$ is reflective of the past expenditure pattern Activity # Duration $($days$)$ Predecessors Budget Actual Cost $\%$ Complete $110$ NA $$300250100281$ $$400450100362$ $$3503801004122$ $$400400705183$ $$405006165$ $$48000$