hi i have to make my function
y=b*(1-exp(lambda*(t^m))
and my data are in excel file with names:
Year /b/lambda/m
and t is an age in another file calls pcb
could u help me please to calculate all y for all years please
i can make this step by step but i want an program for having all y and plot
them in the same windows with legend could u help me please thank u

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