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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def plot_multi(func:Callable[[int,int,plt.Axes],None], r:int=1, c:int=1, figsize:Tuple=(12,6)):
    "Call `func` for every combination of `r,c` on a subplot"
    axes = plt.subplots(r, c, figsize=figsize)[1]
    for i in range(r):
        for j in range(c): func(i,j,axes[i,j])