1.
def capital_count(filename):
    f = open(filename, "r")
    count = 0
    
    for line in f:
        if line[0].isupper():
            count +=1

    f.close()
    return count

2.
def dict_value_count(d, value):
    count = 0

    for k in d:
        if d[k] == value:
            count += 1

    return count


3.
letter_count = {"a":3, "l":1, "e":1, "x":1, "n": 1, "d": 1, "r": 1}

We can declare a dictionary in the same way that it's
printed out, i.e. a comma separated list of key:value
pairs inside curly braces.