Capitalize 1st & 4th letter in multiple words?

I’m trying to modify the above code to capitalize the first and fourth letters of all words in a list.

def my_function(name_list):
    new_list = []
    for name in name_list:
        if len(name) > 3:
            new_list.append(name[:3].capitalize() + name[3:].capitalize())
        else:
            new_list.append('Name is too short')
    return new_list

result = my_function(['oldmac', 'hippo', 'mouse'])
print(result)

Modify the code above to capitalize the first and fourth letters of all words in a list:

def my_function(name_list):
    new_list = []
    for name in name_list:
        if len(name) > 3:
            new_list.append(name[:3].capitalize() + name[3:].capitalize())
        else:
            new_list.append('Name is too short')
    return new_list

result = my_function(['oldmac', 'hippo', 'mouse'])
print(result)

Modify the code to capitalize the first and fourth letters of all words in a list:

def my_function(name_list):
    new_list = []
    for name in name_list:
        if len(name) > 3:
            new_list.append(name[:3].capitalize() + name[3:].capitalize())
        else:
            new_list.append('Name is too short')
    return new_list

result = my_function(['oldmac', 'hippo', 'mouse'])
print(result)

Modify the code to capitalize the first and fourth letters of all words in a given list:

def my_function(name_list):
    new_list = []
    for name in name_list:
        if len(name) > 3:
            new_list.append(name[:3].capitalize() + name[3:].capitalize())
        else:
            new_list.append('Name is too short')
    return new_list

result = my_function(['oldmac', 'hippo', 'mouse'])
print(result)
def my_function(name_list):
    new_list = []
    for name in name_list:
        if len(name) > 3:
            new_list.append(name[:3].capitalize() + name[3:4].capitalize() + name[4:].capitalize())
        else:
            new_list.append('Name is too short')
    return new_list

result = my_function(['oldmac', 'hippo', 'mouse'])
print(result)

Output: ['OldMac', 'HipPo', 'MouSe']